Chemistry Middle School

Which describes the elements in a given period of the periodic table?


A. They have similar chemical properties, such as chemical reactivity.

B. They have the same average atomic mass.

C. They are all in the same family.

D. They increase in atomic number sequentially from left to right.

Answers

Answer 1

Answer:

A

Explanation:

Elements in the same group of the periodic table have similar chemical properties. Elements can be classified as metals, metalloids, and nonmetals, or as a main-group elements, transition metals, and inner transition metals. Groups are numbered 1–18 from left to right.

P.S, All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor. Arranged this way, groups of elements in the same column have similar chemical and physical properties, reflecting the periodic law.

Answer 2
Only Answer could be is A

Related Questions

Help pls
is this direct, constant, indirect, or cycling?

Answers

Answer:

Indirect. I don't think it's cycling and it's not direct or constant

Indirect as the person stated above

HELP HELP ! Which of the following factors does NOT affect surface currents?


A. Coriolis effect

B. density

C. continental deflection

D. wind

Answers

B density

Surface currents are controlled by three factors: global winds, the Coriolis effect, and continental deflections

The surface currents are affected by the continental deflections, winds and the coriolis effect. Density is not a parameter affecting surface currents. Thus option B is correct.

What are surface currents?

Global wind systems, which are powered by solar energy, propel surface currents. Through these currents, heat is transferred from the tropics to the poles; the Gulf Stream, for example, transports warm water from the eastern US coast up to Northern Europe.

When objects travel far distances around the Earth, they are deflected in a manner known as the Coriolis effect. Currents appear to bend to the right in the Northern Hemisphere and to the left in the Southern Hemisphere due to the rotation of our planet.

Both ocean currents that transferring water current and surface currents are affected by global winds and coriolis affects. But they are not influenced by the density factor.

To find more on surface currents, refer here:

https://brainly.com/question/7947534

#SPJ2

Mr Johar gives daisy two solutions. He tells her to choose the best indicator to find out which solution is pH 4 and which is pH 6. Write down which indicator daisy should use. Explain your answer.

Answers

Mr Johar gives daisy two solutions. He tells her to choose the best indicator to find out which solution is pH 4 and which is pH 6. Write down which indicator daisy should use. Explain your answer.

Litmus paper or red cabbage juice will show it

who else is gonna be alone this year on valentines day?
I kinda am every year

Answers

Nah I won’t be alone :))

Answer:

always am

Explanation:

A student placed fruit in a tightly sealed bag and found the mass of the fruit every week. She found the mass did not change over time even though the fruit was going through a chemical change. Is this an example of the Law of Conservation of Mass? Why or why not? Answer in sentences.

Answers

Answer:

mass never changes even if It changes chemical properties.

Answer:

Mass doesn't change at all :)

Explanation:

What are communities doing to prepare for this hazard? Hurricane

Answers

Answer:

they board up the windows evacuate sometimes and barricade doors

Explanation:

Places that usually get hurricanes have basements and they have it all prepared before it hits.

**Suppose a cart is being pushed by a certain net force. If the net force is doubled, by how much does the acceleration change? Explain.


NO WORK = NO CREDIT = REPORT

thx <3

Answers

if the net forced is doubled , the acceleration would also be doubled. F= M,A,F/M = a, 2F/M=2A. sorry if that doesn’t make sense i tried
Other Questions
Which picture shows the correct graph for |x| = 1 I need help in class, I have one more to finish! Pls, help me, guys! help please i will give brainliest I WILL GIVE BRAINLIESTThe _____ Psalms are those in which the king of Israel is either the speaker or the focus of attention.Lamentingroyalhistorical Ida wants to buy a car. She borrows $2500 at an interest rate of 4% and pay the total off after 12 months. What is the amount of interest she will pay each month? ANSWER THESE 2 QUESTIONS FOR 100 FLIPPING POINTS :DDDD Why is light colour given off? 12a+16 factorise fully Select four traits preschoolers will develop if supported and encouraged as toddlers.sharp memorytrust in othersstrong spatial skillsself-confidencecuriositythe need for constant attentionappreciation for musicempathy What is the fraction for 5copies of 1/5 Choose the rate that represents: 175 miles in 4 hour Triangle JKL is dilated with the origin as the center of dilation to create triangle J'K'L' .Which rule best represents the dilation that has been applied to triangle JKL to create triangle J'K'L' What is 3 + 1 in math Identify the slope and y-intercept for 2x + y = 3 What are the layers of the Sun, starting from the center and moving outward? pls help.aWhen an object's speed doubles, its kinetic energy doubles. bWhen an object's speed doubles, its kinetic energy more than doubles. cWhen the mass of an object doubles, its kinetic doubles dWhen the mass of object doubles, its kinetic energy more than doubles. eWhen both the speed and the mass of an object double, its kinetic energy doubles Does anyone know anything about lolita fashion, I could really use help with this.I've been getting into it for a few years, even got my first dress, but does anyone have any advice for more babylitas???This can fit with school, since i'm currently doing a couple essays and reports on the fashion for English, so before anyone try's to flag this, i am in brainly's guide lines!!! a. Writing compound sentences. Step 1 Connect the two simple sentences in each pair to form a compound sentence. Connect them with and, or, or something similar, whichever one fits the meaning best. There may be more than one possible option. Step 2 - Add a comma to every sentence.2. There are several hundred languages in the world. Not all of them have a written From 3. Chinese is spokea by more people. English is spoken in more contra 4. Russian is the third most spoken language in the world. Spanish is the fourth. 5. There are about one million words in English. Most people use only about ten thousand of them. 6. Chinese has many different dialects. 'Chinese people cannot alway understand each other. Jay simplified the expression -3 (3 + 12 3) - 4. For his first step, he added 3 + 12 to get 15. What was Jays error? Find the volume of the following cylinder in CENTIMETRES CUBED.radius=0.5mHeight=5m