What is the chemical symbol for sodium?

• S

• So

• Na

• K

How many protons are in a nitrogen atom?

• 5

• 7

• 14

• 28

Tags

NGSS.MS-PS1-1

In an atom, which subatomic particles are always equal?

• protons and electrons

• protons and neutrons

• neutrons and electrons

• protons, neutrons, and electrons

Tags

NGSS.MS-PS1-1

How many valence electrons do the atoms of elements in group 13 have (the Boron Group)?

• 3

• 5

• 8

• 13

Which of the following elements have atoms that are more massive than chlorine?

• lithium

• helium

• carbon

• argon

Choose ALL of the alkali metals (group 1) from the list below:

• lithium

• copper

• mercury

• potassium

• sodium

True or false: All elements in a family have the same number of valence electrons (except Helium and the transition metals).

• True

• False

How many neutrons does the most common isotope of argon have?

• 18

• 20

• 22

• 8

Tags

NGSS.MS-PS1-1

What is the element that has one more proton than tin (Sn)?

• antimony

• iodine

• lead

• indium

Tags

NGSS.MS-PS1-1

How many total electrons to xenon atoms have?

• 8

• 54

• 131

• 132

Tags

NGSS.MS-PS1-1