integrated science unit 4 2021

Front

What is an isotope?

Back

An isotope is an atom that has the same number of protons but a different number of neutrons compared to another atom of the same element, resulting in a different mass.

Front

What are valence electrons?

Back

Valence electrons are the electrons located in the outermost shell of an atom, which are involved in chemical bonding.

Front

How do you determine the atomic symbol of an element?

Back

The atomic symbol is determined by the number of protons in the nucleus of the atom, which corresponds to the element's atomic number.

Front

What is the difference between Neon-20 and Neon-22?

Back

Neon-20 and Neon-22 are isotopes of Neon that differ in the number of neutrons; Neon-20 has 10 neutrons, while Neon-22 has 12 neutrons.

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 defines the element.

Front

What is the mass number of an atom?

Back

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

Front

What is the significance of valence electrons in chemical reactions?

Back

Valence electrons determine how an atom can bond with other atoms, influencing the chemical properties and reactivity of the element.

Front

What is a neutral atom?

Back

A neutral atom is an atom that has an equal number of protons and electrons, resulting in no overall charge.

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.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus by offsetting the repulsive forces between protons.