Why does scientists use atomic watch?​

Answers

Answer 1

Answer:

atomic watch

Explanation:

it is used for the measurement of time.


Related Questions

please help me with the second image questions it is really important and I really need it please help me out and provide me the answers for the second image two questions, looking at the first image please.

Answers

Answer:

is this exam.. are you coping..

I need HELP A.S.P
B. A +ion (positive ion, one with extra positive charge)?

Answers

Answer:
If an ion has a positive charge then it has lost an
electrons.
Explanation:
So you don't "gain" anything when the ion has a
positive charge. It loses an electron which
means it has more protons than electrons. Thus,
the ion has a positive charge. If it "gained" an
electron then it would have a negative charge.

When potassium metal is placed in water, a large amount of energy is released as potassium hydroxide and hydrogen gas are produced in the reaction 2K(s) + 2H2O(l) → 2KOH(aq) + H2(g). Your lab partner says this is a redox reaction and a combustion reaction. Do you agree? Defend your answer by explaining whether or not it meets the requirements of each type of reaction.

Answers

This is a redox reaction but not a combustion reaction.

Redox Reaction

A type of chemical reaction that involves a transfer of electrons or gain of electrons between two-element. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes.

Combustion reaction

It must have two products. CO2 and H2Ooxygen in the reactant is must.

∴ The reaction is Redox ✓ not combustion

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¿Cuál es la partícula mas pequeña del átomo?

Answers

Answer:

Los quarks son ciertamente unas de las partículas más pequeñas del universo. Son elementales, indivisibles y no se pueden romper en piezas menores.

Explanation:

Something that potatoes and bacteria have in common is that they both reproduce(1 point)


via vegetative reproduction.

using tubers.

via binary fission.

asexually.

Answers

Asexually

Potatoes reproduce asexually through the vegetive propagation mechanism. They have microscopic eyeballs which produce scaly leaves, and new potato plants emerge from these leaves. Only a single individual is responsible for the development of a new species.

Bacteria(Prokaryotes) reproduce asexually through binary fission, where the parent organism divides itself into two, producing genetically identical clones of itself.

The things that potatoes and bacteria have in common is that they both reproduce asexually. Thus option 4 is correct.

What is reproduction?

Reproduction is defined as the biological process that creates new individual organisms from existing ones, also referred to as "offspring"

It can also be defined as the process by which identically minded organisms make new organisms.

There are two types of reproduction.

Sexual reproduction - It is defined as a method of reproduction whereby male and female gametes combine to create an offspring.Asexual reproduction - It is defined as a method of reproduction that doesn't modify the number of chromosomes or involve the fusing of gametes.

Thus. the things that potatoes and bacteria have in common is that they both reproduce asexually. Thus option 4 is correct.

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Help Please

I Have to finish this assignment asap

Answers

Answer:a. limiting reactant

b. actual yield

c. mole ratio

d.excess reactant

e.theoretical yield

f.stoichiometry

g.percent yield

h.limiting reactant

i.theoretical yield

Explanation: ..

What is the main piece of evidence supporting the theory of seafloor spreading?

Fossils of plants and animals along the ocean floor

Volcanic activity along the Ring of Fire

Glacial scratches on the seafloor

Alternating magnetic pattern in the rocks of the ocean floor

Answers

Answer:

Alternating magnetic pattern in the rocks of the ocean floor

Explanation:

The rocky sea floor on either side of mid-ocean ridges has a matching pattern of magnetic stripes. This information provides evidence for sea-floor spreading. The matching striped pattern shows that Earth’s polarity was recorded on either side of the ridge as lava oozed from the ridge and cooled.  

Answer:

Alternating magnetic pattern in the rocks of ocean floor.

Explanation:

The ocean floor consists of several types of rocks.The mid-ocean ridges has a similar pattern as well as magnetic field lines.So this makes a clear evidence.

According to Dalton, atoms cannot be SELECT ALL THAT APPLY a Created b Destroyed c Subdivided d Bonded​

Answers

Answer:

The answer is subdivided,created or destroyed

I need help with the question below

Answers

Answer:

the answer is Crystal structures

what scientist is credited with formulating the octet rule

Answers

Answer:

The electron configuration of the neon atom. American chemist Gilbert Lewis (1875-1946) used this observation to explain the types of ions and molecules that are formed by other elements. He called his explanation the octet rule.

the temperature of absolute zero is stated as ___________.

Answers

Answer:

-273.15 degrees Celsius

-459.67 degrees Fahrenheit

It is considered to be coldest conceivable temperature and is impossible to reach

Explanation:

If you are looking for degrees it is

-273.15 degrees Celsius

-459.67 degrees Fahrenheit

or just 0 on the keilvin scale

Describe the process of pasteurization?

Answers

Answer:

Pasteurization is a process in which packaged and non-packaged foods (such as milk and fruit juice) are treated with mild heat, usually to less than 100 °C (212 °F), to eliminate pathogens and extend shelf life.

C. A - ion (negative ion, one with extra negative charge)?

Answers

Answer:

Negative ion with one extra electron.

BRAINLIST Pls

Anions are the name for ions that have a negative charge. The body contains several common chemicals as ions. Sodium, potassium, calcium, chloride, and bicarbonate are typical examples.

What are anions ?

Negatively charged electrons are called anion. When non-metals gain electrons, they are produced. They absorb one or more electrons. They have a negative charge overall as a result. The ion concentration iodide ( I- ), chloride ( Cl- ), and hydroxide are among examples ( OH– ).

The electrode where reduction takes place in any electrochemical cell  is characterized as the cathode. On the other extreme, the positive electrode will draw anions, or negative ions, to itself.

Thus, when an atom obtains electrons, it transforms into the negatively-charged ion known as an anion.

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Propose an explanation for why the element carbon, rather than sodium, is important in forming natural polymers?
I need this ASAP

Answers

Carbon has a one-of-a-kind ability to make covalent bonds with a wide range of other atoms. It has the ability to form bonds with other carbon atoms as well as atoms from other elements. Carbon frequently forms polymers as a result of this capacity. A polymer is a big molecule composed of numerous smaller molecules linked together by covalent bonds.

please help as soon as possible!!!

Answers

Answer:

the kidney control the amount of water, ion, and other substances in the blood by excreting more or less of them in urine, also secretes the hormones that help maintain homeostasis

Blood has a mass-volume percent of NaCl of 0.9%. What mass (g) of NaCl is present in a liter of blood

Answers

The mass (g) of NaCl that is present in a liter of blood is 0.347g.

HOW TO CALCULATE MASS:

The mass of a substance can be calculated by multiplying the decimal mass-volume of the substance by its molar mass.

According to this question, Blood has a mass-volume percent of NaCl of 0.9%. This means that 0.9/100 = 0.009g of NaCl is present in each 100g of blood.

Molar mass of NaCl = 23 + 35.5 = 38.5g/mol

Mass of NaCl in a liter of blood = 38.5 × 0.009

Mass of NaCl in a liter of blood = 0.347g of NaCl.

Therefore, The mass (g) of NaCl that is present in a liter of blood is 0.347g.

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What is the periodic table? ​

Answers

here u go hope it helps

Answer:

The periodic table, also known as the periodic table of chemical elements, is a tabular display of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is generally seen as an icon of chemistry.

Explanation:

The periodic table is a tabular arrangement of chemical elements that classifies elements according to repeating qualities and is structured by increasing atomic number. Metals are located on the left side of the table, whereas nonmetals are located on the right. The columns are referred to as groupings.

in pic

____________________________________________________

(Hope this helps can I pls have brainlist (crown)

what object in our solar system has the largest gravitational force

Answers

Answer: The sun

Explanation: because it has the most mass

Answer:

Hey there. That would be Jupiter.

Jupiter is the largest in our solar system which means it has the highest gravity.

Who was the first person to introduce the concept of atomic mass?

Answers

John dalton is the answer

Based on the periodic table, what is the oxidation number of oxygen (Group VI, period 2) in compounds? a) 0 b) +2 C) -2 d) 1​

Answers

The oxidation number of oxygen (Group VI, period 2) is -2.

The  electrical charge of an atom describes its Oxidation number.\

The number of electrons that must be gained or lost in an atom's valence electron shell to  make it  to be filled or half-filled gives us the oxidation number value.

When the atom gains electrons,it acquires a negative oxidation number. When the atom loses electrons,it acquires a positive oxidation number

Oxygen has  8 electrons  with   {He] 2s² 2p⁴ configuration.

With 6 electrons in its valence shell, it need to gain 2 electrons to achieve stability, When it gains 2 electrons, it acquires a negative oxidation number of -2.

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Nitrogen has two naturally occurring isotopes.
Predict the number of neutrons in the two isotopes of
nitrogen, N.
How many protons?
Electrons?

Answers

Answer:

Nitrogen has 7 protons and 7 electrons and 7 neutrons.

Explanation:

The atomic number of an element is the number of electrons and protons they have. The atomic mass - the atomic number of an element equals the number of nuetrons. The atomic mass of nitrogen is 14 and the atomic number is 7 therefore we have to subract, 14-7=7.

EASY QUESTION (PLEASE HELP THE INTERNET ISN'T SUCH A BIG HELP RIGHT NOW)
Things microscopes have helped scientists discover about cells.
(No links plz)

Answers

Microscopes allowed scientists to study Bacteria and Archaea, which are prokaryotic cells. These are tiny cells with no membrane-bound organelles. It allowed them to study Eukaryotic cells with a nucleus and membrane-bound organelles that perform various activities throughout life.

Answer:

Adding on to the answer said before, microscopes are pretty much one of the most significant tools used in Biology. It helped discover organelles, and smaller stuff like DNA, and prominently allowed Scientists to discover Bacteria and Archaea, the prokaryotic cells that contribute a big role in the functioning of soil, which is essential for our ecosystem.

cyclic voltametry allows one to measure the __________ of a compound.

Answers

Answer:

*two parameters

Explanation:

A tiny crystal of a solid substance is added to an aqueous solution of the same substance. What would happen if the original solution was: 1) Super saturated 2) Unsaturated 3) Saturated.

Answers

Answer:

3.)Saturated

Explanation:

it was saturated and then turned super saturated

9. The “power plant” of the cell is the

(a) nucleus.

(b) ribosome.

(c) chloroplast.

(d) mitochondria.

Answers

Answer:

D. Mitochondria

Explanation:

The mitochondria, labeled the powerhouse of the cell, are the organelle responsible for energy production within the cell

(D) the mitochondria provide energy through the cell through aerobic respiration :)

When carbon dioxide enters the blood, some of it combines with ____________ to form carbaminohemoglobin, but most of it becomes ____________ ions that diffuse into the blood plasma.

Answers

Answer:

hemoglobin to become bicarbonate

Explanation:

When carbon dioxide enters the blood it combines with hemoglobin to form carbamino hemoglobin or carboxyhemoglobin but most of it becomes carbonate ions and diffuse into the blood plasma.

What is carboxyhemoglobin?

Hemoglobin is a blood protein giving red colour to the blood. It helps to transport oxygen everywhere. When oxygen fills in the air sack, it combines with oxygen and form oxyhemoglobin.

However, hemoglobin have more affinity towards carbon dioxide and and they combines to form carbaminohemoglobin which prevents the transportation of oxygen through blood.

The carbon dioxide will be converted into carbonic acid by combining with water. This acid then forms its carbonate ions and these ions helps to maintain the blood pH to be constant.The carbonate ions, CO₃²⁻can easily diffuse into blood plasma.

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What is collision theory?

A.a theory stating that reactants must collide with products in order for a chemical reaction to occur

B.a theory stating that there must be minimal kinetic energy between products for a chemical reaction to occur

C.a theory stating that a chemical reaction occurs only when reactants strike each other at the correct orientation and with sufficient kinetic energy

D.a theory stating that a chemical reaction occurs only when reactants are placed in separate containers and the containers are then placed close together

Answers

Answer:

A

Explanation:

collision theory is a theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another

According to Dalton, atoms of different elements will be____________.

Answers

Answer:

The atoms of different elements vary in size and mass.

Explanation:

Beryllium (Be) has four electrons. Fluorine (F) has nine electrons. Which chemical formula shows the correct subscripts for the product of the reaction when beryllium and fluorine combine

Answers

Answer:

BeF2

Explanation:

The correct chemical formula for the product of the reaction when beryllium and fluorine combine is BF₂.

The valence electron of an atom determines how an atom goes into bonding.

Beryllium(Be) has 4 electron and has 2 valence electron. To fulfil the octet rule, it can easily give out this 2 electron during bonding.

Fluorine(F) has 9 electrons and 7 valency electrons. To fulfil the octet rule, it readily accepts a single electron.

The correct chemical formula for the product of the reaction when beryllium and fluorine combine is BF₂.

This means 1 atom of beryllium combines with 2 atoms of fluorine to form beryllium fluoride. The beryllium give its 2 valency electrons to the 2 atoms of fluorine. The 2 atoms of fluorine will now have a valency electron of 8 each. The octet rule has been fulfilled at this point.

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Answers

thank you for the points

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