What is atomic number?

• Number of protons in an atoms 
• Number of neutrons in an atom
• Mass of an atom
• Charge on an atom

Which subatomic particles are found in the nucleus of an atom?

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

Tags

NGSS.MS-PS1-1

What electrical charge does a proton have?

• +1
• 0
• -1
• +2

The total number of protons and neutrons in an atom is called the...

• Atomic number
• Proton number
• Mass number
• Weight number

Tags

NGSS.HS-PS1-8

How many protons does an aluminum atom have?

• 27

• 14

• 40

• 13

How many electrons does a sodium atom have?

• 23

• 11

• 12

• 34

Tags

NGSS.MS-PS1-1

Atoms of the same element must always have the same number of _________

• electrons
• neutrons
• isotopes
• protons

The mass number of an element that has 18 protons, 18 electrons, and 19 neutrons is _____.

• 12.5

• 13

• 25

• 37

Tags

NGSS.MS-PS1-1

What element is represented in this Bohr Model? 

• Carbon
• Hydrogen
• Aluminum
• Lithium

Tags

NGSS.MS-PS1-1

What element has 9 protons, 9 electrons, and 10 neutrons?

• nitrogen

• oxygen

• fluorine

• neon

Tags

NGSS.MS-PS1-1