Since atoms are so small, we use a different unit of measurement called

The "control center" of the cell, the nucleus, contains (select all that apply)

• Protons

• Neutrons

• Electrons

This particle has a charge of -1 and is represented by the symbol e-

• Proton

• Neutron

• Electron

True or False: The number of protons always equals the number of electrons.

• True

• False: Neutrons

True or False: Neutrons effect the charge of an atom.

• True

• False: they don't because they have a charge of zero

Even though the same number of protons and neutrons exist in an atom, electrons are _________ than protons.

• Heavier

• Lighter

What does the atomic number tell us?

• How many electrons exist in an atom

• How heavy the element is

• How many protons exist in an atom's nucleus

Periods are __________ and Groups are ____________

• columns, rows

• rows, columns

Noble gases are in group...

• 1

• 2

• 13

• 14

• 18

These particles have the highest energy

• Protons

• Neutrons

• Valence Electrons

• Electrons

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2