Atomic Structure

Front

Where are the metalloids located on the periodic table?

Back

Metalloids are located in the green region of the periodic table.

Front

How many protons does an atom with atomic number 5 have?

Back

An atom with atomic number 5 has 5 protons.

Front

How many neutrons are in a lithium atom with an atomic mass of 7?

Back

A lithium atom with an atomic mass of 7 has 4 neutrons.

Front

What is the arrangement of valence and core electrons in a neutral atom with atomic number 15?

Back

There are 5 valence electrons and 10 core electrons.

Front

If a hydrogen atom emits red, blue-green, blue, and violet light, how many energy levels does it have in the visible region of the spectrum?

Back

The hydrogen atom has 5 energy levels in the visible region of the spectrum.

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

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 difference between core electrons and valence electrons?

Back

Core electrons are the inner electrons that are not involved in bonding, while valence electrons are the outermost electrons that participate in chemical reactions.

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.

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals.