What do we call the columns in the periodic table?

What do we call the rows in the periodic table?

Why do we put elements in the same group?

• They have the same colour

• They react with the same things

• They have the same state

• They have the same properties

Which 3 elements are all in group 2?

• Mg, Ba, Ca

• Mg, Al, Na

• Mg, Ba, C

• Ca, Sr, Fe

Which of 3 elements are all in group 6?

• O, N, F

• O, S, Te

• S, P, Cl

• As, Te, Pb

What element is in group 5, period 3?

What element is in the same group as sulfur and same period as carbon?

Was Mendeleev the first person to come up with the idea of the periodic table?

• Yes

• No

Why did he leave gaps in his periodic table?

• For other scientists to contribute

• because he likes the gaps

• For undiscovered elements

Which group of elements was not in Mendeleev's periodic table?

• Group 0 - Noble gases

• Group 1 - Alkali metals

• Group 2 - Alkali Earth metals

• Group 7 - The halogens