Multiple-Choice Questions

The atomic number (Z) of an element represents:

• Number of neutrons

• Number of protons

• Number of electrons + neutrons

• Atomic mass

If an element has 6 protons, its atomic number is:

• 8

• 12

• 6

• 3

The atomic mass number (A) is equal to:

• Number of protons only

• Number of neutrons only

• Number of protons + electrons

• Number of protons + neutrons

An atom of carbon has 6 protons, 6 electrons, and 6 neutrons. Its mass number is:

• 6

• 12

• 18

• 0

Tags

NGSS.MS-PS1-1

Which subatomic particle has a negative charge?

• Proton

• Neutron

• Electron

• Positron

Which of the following is the correct chemical symbol for sodium?

• So

• S

• Na

• N

The number of neutrons in an atom can be found by:

• Subtracting the atomic number from the atomic mass number

• Adding the atomic number and the atomic mass number

• Dividing the atomic mass by 2

• Counting the electrons

Which statement about protons is TRUE?

• They have a negative charge

• They are found outside the nucleus

• Their number determines the element’s identity

• They have no mass

Which element has the symbol O?

• Gold

• Oxygen

• Osmium

• Oxide

If an atom has 11 protons, 11 electrons, and 12 neutrons, which element is it?

• Magnesium (Mg)

• Sodium (Na)

• Potassium (K)

• Neon (Ne)

Tags

NGSS.MS-PS1-1