Periodic Table Flashcard

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 determines the element's identity.

Front

How many protons does an atom with an atomic number of 11 have?

Back

11 protons.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

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

Back

Number of neutrons = Atomic mass - Atomic number.

Front

What is the atomic mass of an atom with 11 protons and 10 neutrons?

Back

The atomic mass is 21 (11 protons + 10 neutrons).

Front

What element has an atomic number of 8?

Back

Oxygen.

Front

If an atom has 5 protons, what is its atomic number?

Back

5.

Front

How many neutrons are in a Fluorine atom with a mass number of 19?

Back

9 neutrons (19 - 10 protons).

Front

What is the mass number of an atom with 11 protons and 5 neutrons?

Back

The mass number is 16 (11 protons + 5 neutrons).

Front

What does the atomic number tell you about an element?

Back

It tells you the number of protons and identifies the element.