Atom Assessment

A proton has a ___ and is found in the ___ while the electron has a ___ and is found in the ___.

• positive charge, nucleus, negative charge, the electron cloud

• negative charge, nucleus, positive charge, electron cloud.

• positive charge, electron cloud, negative charge, nucleus.

Why do atoms have a neutral charge?

• The numbers of protons and neutrons are equal and cancel each other out.

• The numbers of protons and electrons are equal and cancel each other out.

• The numbers of neutrons and electrons are equal and cancel each other out.

The smallest particle of any element which has the properties of that substance is

• an element

• an atom

• a molecule

An atom with 12 neutrons and 8 protons has a mass of

• 12

• 8

• 20

Which of these statements is correct?

• A proton is a negatively-charged particle in the nucleus.

• An electron is a negatively-charged particle in the nucleus.

• A proton is a positively-charged particle in the nucleus.

The nucleus of an atom...

• is the central part of the atom, positively charged, and has most of the mass of the atom.

• makes up most of the atom, is positively charged, and has the least of the mass of the atom.

• is the central part of the atom, negatively charged, and has the least mass of the atom

Which of the following occupies most of the space of an atom?

• protons

• neutrons

• electron cloud

An atom with 10 protons also has

• a mass of 10

• 10 neutrons

• 10 electrons

The two main parts of an atom are the

• protons and electrons

• neutrons and the electron cloud

• nucleus and the electron cloud

What part of the atom is the arrow pointing toward?

• Energy levels

• Nucleus

• Electron cloud