The atomic number of an element is determined by the number of (a)  

• Neutrons
• Electrons
• Protons
• Nuclei

The charge of a neutron is (a)  

• Positive
• Negative
• Neutral
• Variable

Fill in the blank: The center of an atom is called the ____.

• Electron Cloud

• Nucleus

• Proton

• Neutron

• A) Element symbol

• B) Mass number

• C) Atomic number

• D) Neutron number

Tags

NGSS.HS-PS1-8

Fill in the blank: The mass number is the sum of the number of protons and ______.

• Electrons

• Neutrons

• Atoms

• Molecules

How many protons does Carbon (C) have? (Use a periodic table)

• 6

• 12

• 8

• 14

Tags

NGSS.MS-PS1-1

What is the mass number of Nitrogen (N)? (Use a Periodic table)

• 7

• 14

• 5

• 10

What is an ion?

• A neutral atom

• A charged atom

• A molecule

• A compound.

An anion is a (a)   .

• positive ion
• negative ion
• neutral ion
• charged molecule

A cation is a ______.

• negative ion

• positive ion

• neutral ion

• charged molecule.