Unit-4-5 Flashcard Chem - H

Front

What are isotopes?

Back

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

Front

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

Back

74.92 amu

Front

Where are protons and neutrons located in an atom?

Back

Protons and neutrons are found in the nucleus of the atom.

Front

What are electrons?

Back

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

Front

What charge does an electron have?

Back

An electron has a negative charge (-).

Front

What is the nucleus of an atom?

Back

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

Front

How do isotopes of an element differ from each other?

Back

Isotopes differ in the number of neutrons they contain.

Front

What is the significance of the atomic mass of an element?

Back

The atomic mass reflects the average mass of an element's isotopes, weighted by their natural abundance.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of the atom and help stabilize the nucleus.

Front

What is the charge of a proton?

Back

A proton has a positive charge (+).