Science Atoms

What number indicates the nucleus?

• 1
• 2
• 3
• 4

Where is most of the mass in an atom located?

• in the nucleus
• in the protons
• in the neutrons
• in the electrons

Tags

NGSS.HS-PS1-8

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

Tags

NGSS.MS-PS1-1

What is the atomic number?

• number of protons
• number of neutrons

valence electrons can be describe as the ________

• electrons in the first energy level
• electrons closest to the nucleus
• electrons in the outermost level
• electrons and electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

This particle determines what element you have - the elements identity.

• electron
• proton
• neutron
• valence shell

Which particles make up the nucleus of an atom?

• protons and neutrons
• electrons and protons
• electrons, protons, and neutrons
• electrons and neutrons

Tags

NGSS.MS-PS1-1

How many protons are in Zirconium (Zr) ?

• 40

• 91

• 30

• 65

Tags

NGSS.MS-PS1-1

How many valence electrons are in the outer shell of Xenon (Xe) ?

• 8
• 18
• 10
• 6

Tags

NGSS.HS-PS1-1

Fluorine has an atomic number of 9. What can you conclude about an atom of fluorine from this fact?

• it has 9 protons
• it weighs 9 grams
• it has 9 electron shells
• it has a boiling point of 9 degree celsius

Tags

NGSS.MS-PS1-1