Atomic Number

An element has an atomic number of 2. How many protons do the atoms contain?

Sodium has an atomic number of 11. How many protons does each sodium atom have?

• 33

• 22

• 11

• 0

Argon has an atomic number of 18. How many protons does each Argon atom have?

Which of these statements is INCORRECT?

• The number of protons determines the atomic number.

• The atomic number and number of protons are the same.

• An atomic number of 5 means there are 5 protons.

• The number of neutrons is always the same as the number of protons.

Tags

NGSS.MS-PS1-1

What is the atomic number of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

The fluorine atom has an atomic number of

• 19

• 9

Tags

NGSS.MS-PS1-1

What is the atomic number?

• the number of protons

• the number of protons and neutrons

• the number of neutrons

• the number of atoms

These will determine what element an atom is. 

• number of neutrons

• number of electrons

• number of atoms 

• number of protons 

What is the formula to solve for the neutron?

• Mass + Atomic Number= Neutrons

• Mass x Atomic Number = Neutrons

• Mass - Atomic Number = Neutrons

• Mass + Number of Protons = Neutron

Tags

NGSS.MS-PS1-1

How many neutrons does the an element with an atomic number of 3 and a mass of 6.9 contain?

• 6.9

• 4

• 3

• 7

Tags

NGSS.MS-PS1-1