Atoms, Elements and the Periodic Table

What is a compound?

An element's atomic number tells how many protons its atom contain.

Each element has a chemical symbol.

In general, metals are ____.

Rutherford was surprised that most of the alpha particles in his experiment ___

Which of the following is a characteristic that is typical of a solid, nonmetal element?

Which is a heterogeneous mixture?

Atomic mass tells the average mass of an elements atoms.

Heterogeneous mixtures have smaller parts that are the same as each other.

Who discovered the electron?

The lowest energy level is closest to the nucleus and can hold only two electrons.

______ suggested that electrons move in energy levels.

Homogeneous mixtures can be solids, liquids, or gases.

Three quarters of the elements are ___.

Matter is anything that occupies space and has mass.

In general, nonmetals are ___.

A chemical formula shows which elements and how many atoms of each make up a compound.

The number of ____ determines what kind of element the atom is.

Who discovered the neutron?

What is a solution an example of?

What does the atom consist of?

Which of the following are found close to the right side of the periodic table?

Elements are the building blocks of matter.

Which scientists below introduced .. matter is made up of tiny, individual bits called atoms?