Atomic Structure

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

• 18 protons

• 40 protons

• 22 protons

• 21.9 protons

Tags

NGSS.MS-PS1-1

When you two atoms with different masses, Carbon-12 and Carbon-13 for example, what type of atom do you have?

• Neutral atom

• Ion

• Isotope

When you two isotopes of an atom, Carbon-12 and Carbon-13 for example, what has changed in the atomic structure?

• Number of protons

• Number of neutrons

• Number of electrons

Tags

NGSS.HS-PS1-8

When you have an ion of an atom, O^-2 for example, what has changed in the atomic structure?

• Number of protons

• Number of neutrons

• Number of electrons

Tags

NGSS.MS-PS1-1

When you have a negative ion of an atom, O^-2 for example, do you have a higher number of protons or electrons?

• Number of protons

• Number of electrons

When you have a positive ion of an atom, Na⁺¹ for example, do you have a higher number of protons or electrons?

• Number of protons

• Number of electrons

Which of the following is correct?

• Protons are positive, electrons are negative, neutrons are neutral.

• Protons are neutral, electrons are negative, neutrons are positive

• Protons are negative, electrons are positive, neutrons are neutral

• Protons are positive, electrons are neutral, neutrons are negative

Tags

NGSS.MS-PS1-1

Al⁺³

The +3 tell you the

• number of protons.

• atomic mass.

• charge of the atom.

The atomic mass of an atom is equal to

• number of protons plus number of neutrons

• number of protons plus number of electrons

• number of electrons plus the number of neutrons

Tags

NGSS.MS-PS1-1

What two subatomic particles must be equal for an atom to have no charge (neutral).

• protons and neutrons

• protons and electrons

• electrons and neutrons

Tags

NGSS.MS-PS1-1