Front

Which statement defines the nucleon (mass) number of an element?

Back

It is the total number of electrons, neutrons and protons.

Front

In an atom there are n neutrons, p protons and e electrons. For this atom, how is the nucleon (mass) number defined?

Back

The nucleon (mass) number is defined as the sum of protons and neutrons in the nucleus.

Front

Which row shows the properties of a particle present in a hydrogen atom, H? Options: A, B, C, D

Back

D

Front

An element has two isotopes. Which statement about the atoms of each isotope is correct? They have the same number of electrons and a different number of protons. They have the same number of neutrons and a different number of electrons. They have the same number of protons and a different number of neutrons. They have the same number of protons and neutrons and a different number of electrons.

Back

They have the same number of protons and a different number of neutrons.

Front

One isotope of hydrogen is represented by the symbol, H. Which diagram represents another isotope of hydrogen?

Back

D

Front

Which particles make up the nucleus of an atom?

Back

neutrons and protons only

Front

Which row respect ion

Back

D

Front

Which properties is correct? A, B, C, D

Back

D