Front

The nucleus of an atom is ____.

Back

the central core and is composed of protons and neutrons.

Front

Carbon-14 has ____ protons, ____ electrons, and _____ neutrons.

Back

6 protons, 6 electrons, and 8 neutrons.

Front

The smallest particle of an element that retains the properties of that element is a(n) ____.

Back

Atom.

Front

What is the average atomic mass of an element with 24.1% of isotopes at 75.23 amu, 48.7% at 74.61 amu, and 27.2% at 75.20 amu?

Back

74.92 amu.

Front

An isotope has three forms: 30% at 4 amu, 20% at 5 amu, and 50% at 3 amu. What is the average atomic mass?

Back

4 amu.

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 are electrons?

Back

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

Front

Define atomic mass unit (amu).

Back

An atomic mass unit (amu) is a standard unit of mass that quantifies mass on an atomic or molecular scale.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.