Review: Atoms, Bohr Models, Lewis Dot

Front

What identifies an atom as a specific element?

Back

The number of protons in its nucleus.

Front

Can an atom of Hydrogen have 2 protons?

Back

No, because protons identify the 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.

Front

What does a Lewis dot diagram represent?

Back

A Lewis dot diagram represents the valence electrons of an atom.

Front

How many valence electrons does nitrogen (N) have?

Back

Nitrogen has 5 valence electrons.

Front

What is the name of the element with the atomic number 18?

Back

Argon.

Front

What do two atoms with different numbers of protons represent?

Back

Different elements.

Front

What is the significance of protons in an atom?

Back

Protons determine the identity of the element.

Front

What is the correct Lewis dot structure for oxygen (O)?

Back

Oxygen has 6 valence electrons, represented as :O:.

Front

What is the relationship between atomic number and element identity?

Back

The atomic number uniquely identifies an element.