Model of an Atom

In an atom, what is the number of protons equal to?

• The number of electrons.
• The number of neutrons.
• The number of molecules.
• The number of nuclei.

The negatively charged particles of an atom are the ______.

• electrons
• protons
• neutrons
• protons & neutrons

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

An atom is the smallest piece of a(an) _____ you can get. 

• mixture 
• compound 
• molecule 
• element 

What is the mass number?

• the number of protons
• the sum of the number of protons and the number of neutrons in the nucleus of an atom 
• the number of electrons
• the number of neutrons

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

What does the 1.00794 stand for?

• mass number

• atomic number

• average atomic mass

• number of protons

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

• 14
• 7
• 15
• 18

If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?

• 10
• 20
• 30

Tags

CCSS.8.EE.A.3

If the mass number of this chlorine atom is 36, how many neutrons does it have?

• 17

• 18

• 19

• can't be determined