Use a periodic table to help you answer the following questions. How many protons does an atom of bromine (Br) have?

• 35

• 34

• 36

• 37

In which group number is bromine found?

• 17

• 16

• 18

• 15

What is the common name of this chemical family?

• Halogens

• Noble Gases

• Alkali Metals

• Transition Metals

What ion is it most likely to form in compounds?

• Br-

• Cl-

• I-

• F-

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In which group number is argon found?

• 18

• 1

• 8

• 16

How does its atomic radius compare to that of krypton (Kr)?

• Smaller

• Larger

• Equal

• Cannot be determined

What ion is it most likely to form in compounds?

• Ar+

• Ar2+

• Ar-

• Ar3+

Tags

NGSS.HS-PS1-1

How many protons does an atom of potassium (K) have?

• 19

• 20

• 18

• 21

What is the common name of this chemical family?

• Alkali Metals

• Noble Gases

• Halogens

• Transition Metals

How many valence electrons does it have?

• 1

• 2

• 3

• 4