Atomic Structure

Front

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

Options: 18 protons, 40 protons, 22 protons, 21.9 protons

Back

18 protons

Front

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

18 neutrons

,

40 neutrons

,

22 neutrons

,

21.9 neutrons

Back

22 neutrons

Front

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

Options: 18 electrons, 40 electrons, 22 electrons, 21.9 electrons

Back

18 electrons

Front

Which part of an atom is used to identify it?

Back

number of protons

Front

When you have two atoms of the same kind with different masses, what type of atom do you have?

Back

Isotope

Front

What changes in the atomic structure when you have two isotopes of an atom, like Carbon-12 and Carbon-13?

Back

Number of neutrons

Front

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

Back

Number of electrons

Front

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

Back

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

Front

The atomic mass of an atom is equal to

Back

number of protons plus number of neutrons

Front

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

Back

protons and electrons