Atoms - Grade 7

The center of the atom is called the _________.

• nucleus

• proton

• neutron

• electron

A positively charged subatomic particle is a/an _________.

• proton

• neutron

• electron

• valence electron

A negatively charged subatomic particle is called a/ an _____________.

• proton

• neutron

• electron

A subatomic particle that has NO charge is a/an _____________.

• proton

• neutron

• electron

Electrons in the outer shell are called _____________

• outside

• distant

• valence

• mass

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following are not names for the areas that electrons are found in?

• Cloud

• Shell

• Orbital

• Space

Electrons can fill the first 3 clouds with the following numbers of electrons....

• 2, 10, 8

• 2, 8, 18

• 8, 2, 18

• 10, 2, 8

Tags

NGSS.HS-PS1-1

Atomic number ALWAYS = the number of _________

• Neutrons

• Nucleus

• Protons

• Mass

Atomic Mass =

• Protons + Electrons

• Protons + Neutrons

• Electrons + Neutrons

What is found in the nucleus?

• Electrons

• Protons and Electrons

• Neutrons and Electrons

• Protons and Neutrons