Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

Which letter represents a proton?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

Which subatomic particle has a negative (-) charge?

• Proton
• Electron
• Neutron

The horizontal row on the periodic table is called a

• group
• family
• period
• atomic number

Tags

NGSS.HS-PS1-1

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases

Tags

NGSS.HS-PS1-1

Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

Tags

NGSS.HS-PS1-1

In what section would Noble Gases be found?

• white
• yellow
• blue
• red

Tags

NGSS.HS-PS1-1

Silicon has an atomic number of 14 and an atomic mass of 28. How many neutrons does it have?

• 14

• 28

• 2

• 10

Tags

NGSS.MS-PS1-1

Which of the following is the electron configuration for Magnesium, Mg? (Atomic number 12)

• 2-4-4

• 2-8-2

• 2-8

• 2-4-6