Atoms

Which statement describes an atomic nucleus?

An atomic nucleus contains most of the atom's mass.

Which argument best explains the charge of an atomic nucleus?

An atomic nucleus is positively charged because it is composed of protons.

What do an electron and a neutron have in common?

Each particle exists inside an atom

How does an atom change if all of its electrons are removed?

The atom becomes positively charged.

What are the two parts of an atom?

the nucleus and the electron cloud

Students are completing a table about a particular subatomic particle that helps make up an atom.

with "Outside of the nucleus," because the particle is an electron

What is the mass of a neutron?

1 amu

What value is closest to the mass of the atom?

10 amu

The Venn diagram compares protons with neutrons. Which shared property belongs in the region marked "B"?

Has mass of 1 amu

Which is a characteristic of the part of the atom marked "B"?

It is negatively charged.

Which is a characteristic of the part of the atom marked "A"?

It is very dense.

Students are completing a table about a particular subatomic particle that helps make up an atom. The students have filled in one cell of the table so far.

Its location is in the nucleus, because the particle is a proton or a neutron.

Which statement best explains why the overall charge on an atom is zero?

The positive charge of the protons in the nucleus equals the negative charge in the electron cloud.

What is most likely true of an atom with a mass of 15 amu

The total number of protons and neutrons is 15.

Roberto creates an animation titled "Flying through an Atom." The animation makes it seem as if the viewer passes all the way through an atom, starting from one side, then through the atom's center, and then leaving through the other side. What is the best description of the order of events in the animation?

The viewer travels through the electron cloud, then the nucleus, and then the electron cloud again.