Atoms and Molecules

What is the charge of a proton?

• Positive

• Neutral

• Negative

• None of the above

Answer explanation

The charge of a proton is positive, so the correct answer is 'Positive'.

Where are electrons located?

• Outside the atom

• Inside the nucleus

• Orbitals

• Nucleus

Answer explanation

Electrons are located in orbitals around the nucleus of an atom, making 'Orbitals' the correct choice.

What is the mass of an electron?

• 2000 amu

• 1 amu

• 1000 amu

• Zero

Answer explanation

The mass of an electron is considered to be zero.

What is the atomic number of an element equal to?

• Number of protons

• Number of electrons

• Number of neutrons

• Mass number

Answer explanation

The atomic number of an element is equal to the number of protons in its nucleus.

Where are neutrons located?

• Outside the atom

• Orbitals

• Inside the nucleus

• Nucleus

Answer explanation

Neutrons are located inside the nucleus of an atom.

What is the net charge of a neutral atom?

• Zero

• Negative

• None of the above

• Positive

Answer explanation

The net charge of a neutral atom is zero because it has an equal number of protons and electrons, resulting in no overall charge.

What is the charge of an electron?

• Positive

• Neutral

• Negative

• None of the above

Answer explanation

The charge of an electron is negative, so the correct answer is 'Negative'.

What is the mass number of an element equal to?

• Number of protons

• Number of electrons

• Number of neutrons

• Mass number

Answer explanation

The mass number of an element is equal to the number of neutrons.

What is the net charge of a cation?

• Zero

• Negative

• None of the above

• Positive

Answer explanation

A cation has a positive net charge due to the loss of one or more electrons.