Describing Trends

Which element has properties most similar to those of Fluorine?

• Chlorine (Cl)

• Oxygen (O)

• Calcium (Ca)

• Boron (B)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element is the most reactive?

• Beryllium

• Calcium

• Strontium

• Radium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the alkali metals, which element has a larger atomic radius?

• lithium, Li

• sodium, Na

• potassium, K

• cesium, Cs

Tags

NGSS.HS-PS1-1

Looking at period 3, which element has the smallest atomic radius?

• Mg

• Cl

• Al

Tags

NGSS.HS-PS1-1

As you move across a period, what happens to the nuclear charge in the atoms?

• It increases because more protons are added.

• It decreases because protons are taken away.

• It stays the same.

In group 2, which of these elements has the largest atomic radius?

• Ba

• Mg

• Ca

• La

Tags

NGSS.HS-PS1-1

Which of the following elements is the most electronegative?

• Hydrogen, H

• Aluminum, Al

• Oxygen, O

• Cesium, Cs

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these halogens has the largest atomic radius?

• fluorine, F

• chlorine, Cl

• bromine, Br

• iodine, I

In the halogen family, which element is the most electronegative?

• iodine, I

• fluorine, F

• chlorine, Cl

• helium, He

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In a chemical reaction, what trend is observed in the rate of reaction when the temperature is increased?

• The rate of reaction increases.

• The rate of reaction decreases.

• The rate of reaction remains constant.

• The rate of reaction becomes zero.

Tags

NGSS.HS-PS1-5