7th Grade 7.PS1 Assessment Questions

Front

What is the atomic structure of neon?

Back

Neon is a noble gas that exists as a monoatomic element, meaning it consists of single atoms rather than molecules.

Front

What is a substance made from atoms of nitrogen and hydrogen?

Back

Ammonia gas (NH3) is a substance made from atoms of nitrogen and hydrogen.

Front

What is the atomic mass of an element?

Back

The atomic mass of an element is the sum of the number of protons and neutrons in its nucleus.

Front

How many protons does strontium have?

Back

Strontium has 38 protons.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically and its bonding behavior.

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 difference between atomic mass and atomic number?

Back

Atomic mass is the total number of protons and neutrons, while atomic number is just the number of protons.

Front

What is a diatomic element?

Back

A diatomic element is a molecule composed of two atoms, which can be of the same or different elements.

Front

What is the electron configuration of an element?

Back

The electron configuration describes the distribution of electrons in an atom's orbitals.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the atomic mass and help stabilize the nucleus.