Unit 2 Test REVIEW

Front

What happens to an electron when it moves from a lower energy level to a higher energy level?

Back

The electron becomes more excited.

Front

How many valence electrons does Magnesium have in its Lewis dot model?

Back

Magnesium has 2 valence electrons.

Front

What is a substance that is not a compound?

Back

Cl (Chlorine) is not a compound; it is an element.

Front

What is the lowest energy state of an atom called?

Back

The lowest energy state of an atom is called the ground state.

Front

What is the relationship between wavelength and frequency?

Back

As wavelength increases, frequency decreases.

Front

Define valence electrons.

Back

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

Front

What is the significance of the ground state in atomic theory?

Back

The ground state is the most stable state of an atom, where it has the lowest energy.

Front

What is the formula to calculate the energy of a photon?

Back

Energy (E) = h * frequency (ν), where h is Planck's constant.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What does the term 'excited state' refer to in atomic physics?

Back

The excited state refers to an atom that has absorbed energy and has electrons in higher energy levels than the ground state.