1st Sem Final Test Nuclear Chemistry and Atomic Structure

Front

What is the mass number?

Back

The sum of the number of protons and the number of neutrons in the nucleus of an atom.

Front

What is at the center of every atom?

Back

A nucleus.

Front

What are negatively charged particles emitted from a nucleus at a high speed?

Back

Beta particles.

Front

Complete the nuclear reaction: 85^209At --> ___ + 2^4He

Back

83^205Bi.

Front

What is the mass number of this particle? (If the particle has 12 protons and 12 neutrons)

Back

24.

Front

Define an atom.

Back

The smallest unit of matter that retains the properties of an element.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

What is nuclear fission?

Back

The process of splitting a heavy nucleus into smaller nuclei, releasing energy.