Period Table and Atomic Numbers

Which number represents the atomic number of this element?

• 12.011
• 6
• 3
• 12

Tags

NGSS.HS-PS1-1

Which number represents the atomic mass of this element?

• 12.011
• 6
• 3
• C

Tags

NGSS.MS-PS1-1

The "C" on this element square is called the...

• atomic number
• atomic mass
• element name
• symbol

The atomic number is also equal to the number of .....

• protons & neutrons
• neutrons & electrons
• protons & electrons
• all of the subatomic particles

To find the number of neutrons in an atom you have to ....

• Add the protons and electrons
• Subtract the atomic number from the atomic mass
• Subtract the electrons from the protons
• Add the atomic number to the atomic mass

What subatomic particles are located in the electron cloud?

• protons
• neutrons
• electrons
• nucleus

What subatomic particles are located in the nucleus of an atom?

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

What is the smallest unit of all matter?

• atom
• cell

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is located in the center of an atom?

• electron cloud
• valence electrons
• empty space
• nucleus

A positively charged particle that is found in the nucleus of an atom is called a ....

• neutron
• electron
• protron