Ch 8 Atoms and the Periodic Table

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

The central region of an atom where its neutrons and protons are located is its

• nucleus

• electron cloud

• core

• center

An atom with atomic number 8 would have how many protons

• 8

• 16

• 4

• it depends on atomic mass

An atom is neutral because...

• it has the same number of protons as neutrons

• it has the same number of protons as electrons

• it has the same number of neutrons as electrons

• the protons are in the nucleus

A particle that moves around the nucleus is a(n)...

• Proton
• Neutron
• Electron
• Quark

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

Tags

NGSS.MS-PS1-1

If an atom has 12 protons, which of the following must it also have to be considered a neutral atom?

• 12 neutrons

• 12 electrons

• 12 protons

• 24 protons and neutrons

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

• 17

• 18

• 19

• can't be determined

Tags

NGSS.MS-PS1-1

Most of the mass of an atom is found in the ______.

• nucleus

• proton

• electron cloud

• isotope