PHET BUILD AN ATOM

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What does a -2 ion indicate about an atom?

Back

A -2 ion indicates that the atom has gained two electrons, resulting in a negative charge.

Front

What is the charge of a neutral atom?

Back

A neutral atom has no overall charge, meaning the number of protons equals the number of electrons.

Front

What is the charge of a +1 ion?

Back

A +1 ion indicates that the atom has lost one electron, resulting in a positive charge.

Front

How many electrons does an atom with an atomic number of 8 have?

Back

An atom with an atomic number of 8 has 8 electrons if it is neutral.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number determines the position of an element in the periodic table and its chemical properties.

Front

What happens to the charge of an atom when it loses electrons?

Back

When an atom loses electrons, it becomes positively charged.

Front

What happens to the charge of an atom when it gains electrons?

Back

When an atom gains electrons, it becomes negatively charged.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.