Understanding Element Notation and the Periodic Table

What is an element?

• A compound of multiple elements

• A pure substance made of one type of atom

• A type of molecule

• A mixture of different atoms

How are elements arranged in the periodic table?

• By their color

• By their atomic weight

• By their atomic number

• By their melting point

What does the atomic number represent?

• The number of atoms in a molecule

• The number of electrons in an atom

• The number of neutrons in an atom

• The number of protons in an atom

What is the significance of the letters in the periodic table?

• They represent the atomic number

• They are random symbols

• They indicate the element's weight

• They are symbols for the elements

How is the mass number of an element calculated?

• By adding the number of protons and electrons

• By adding the atomic number and the number of neutrons

• By subtracting the atomic number from the number of electrons

• By multiplying the atomic number by the number of neutrons

What is the mass number of aluminium if its atomic number is 13 and it has 14 neutrons?

• 26

• 27

• 14

• 13

How many neutrons are in sodium if its atomic number is 11 and its mass number is 23?

• 12

• 11

• 23

• 10

How many protons are in fluorine?

• 8

• 9

• 10

• 11

How many electrons are in a neutral atom of fluorine?

• 9

• 8

• 11

• 10

How many neutrons are in fluorine if its atomic number is 9 and its mass number is 19?

• 9

• 8

• 11

• 10