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Question 1

Name the four scientists involved in the development of the periodic table

Answer 1

John Dalton, John Newlands, Dimitri Mendeleev, Henry Moseley

Question 2

Describe the contribution of Dalton to develop the periodic table

Answer 2

Ordered elements based on their atomic mass

Question 3

Describe the contribution of Newlands to develop the periodic table

Answer 3

Kept atomic mass. Discovered a repeating pattern every 8th element

Question 4

Describe the contribution of Mendeleev to develop the periodic table

Answer 4

Switched positions of elements that did not fit patterns. Left gaps for undiscovered elements

Question 5

Describe the contribution of Moseley to develop the periodic table

Answer 5

Ordered elements based on the number of protons they had

Question 6

Give the properties of alkali metals

Answer 6

Very reactive, low melting/boiling points, react vigorously with water and halogens

Question 7

Give the properties of the halogens

Answer 7

Low melting/boiling points, poor conductors of heat/electricity, toxic, react with alkali metals

Question 8

Give the properties of noble gases

Answer 8

Very unreactive, stable, full outer shell, exist as single atoms

Question 9

Identify the pattern of reactivity in group 1 (Alkali metals)

Answer 9

The Alkali metals become more reactive as you go down the periodic table

Question 10

Identify the pattern of reactivity in group 7 (Halogens)

Answer 10

The Halogens become less reactive as you go down the periodic table

Question 11

Give the word equation for the reaction between an alkali metal and water

Answer 11

Alkali metal + water → Alkali metal hydroxide + hydrogen

Question 12

Define a displacement reaction

Answer 12

When a more reactive element takes the place of a less reactive element in a compound