Semester 1 final 24-25: atoms, PT, E-Config and bonding

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is the periodic table (PT)?

Back

The periodic table is a tabular arrangement of elements, organized by increasing atomic number, that shows the relationships between them.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How many periods are in the periodic table?

Back

There are 7 periods in the periodic table.

Front

What is the atomic number of Sodium (Na)?

Back

The atomic number of Sodium (Na) is 11.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What charge does a neutron have?

Back

A neutron has no charge; it is neutral.

Front

How do you determine the number of neutrons in an atom?

Back

To find the number of neutrons, subtract the atomic number from the mass number.

Front

What is electron configuration?

Back

Electron configuration is the distribution of electrons in an atom's electron shells and subshells.

Front

What is an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net charge.