7th Sci--Phy Chp 9 Test

Front

Smaller particles that make up protons and neutrons

Back

Quarks are the fundamental particles that combine to form protons and neutrons.

Front

What determines the identity of an element?

Back

The number of protons in an atom's nucleus determines the identity of an element.

Front

What is the center of an atom called?

Back

The nucleus is the center of an atom, containing protons and neutrons.

Front

In alpha decay, what happens to the atomic number?

Back

In alpha decay, the atomic number decreases by 2.

Front

What can a scanning tunnel microscope (STM) see?

Back

A scanning tunnel microscope (STM) allows scientists to see atoms.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom.

Front

What is an electron?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes.

Front

What is the role of quarks in atomic structure?

Back

Quarks combine to form protons and neutrons, which make up the nucleus of an atom.