Bohr models and valence electrons

Front

What is the atomic number of an element?

Back

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

Front

What is the significance of valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom and are important for determining how an atom will bond with other atoms.

Front

How many electrons can fit in the first energy level?

Back

The first energy level can hold a maximum of 2 electrons.

Front

What is the maximum number of electrons in the second energy level?

Back

The second energy level can hold a maximum of 8 electrons.

Front

What does a group in the periodic table represent?

Back

A group in the periodic table represents a column of elements that have similar chemical properties and the same number of valence electrons.

Front

How many energy levels does an atom of aluminum (Al) have?

Back

An atom of aluminum has 3 energy levels.

Front

What is the Bohr model of the atom?

Back

The Bohr model is a representation of the atom where electrons orbit the nucleus in defined energy levels.

Front

What is the relationship between the number of protons and the atomic number?

Back

The atomic number is equal to the number of protons in the nucleus of an atom.

Front

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

Back

The number of neutrons can be determined by subtracting the atomic number from the atomic mass (rounded to the nearest whole number).

Front

What is the electron configuration of beryllium (Be)?

Back

The electron configuration of beryllium is 1s² 2s².