periodic table

Question 1

what does the period number tell us about the element

Answer 1

the number of electron shells

Question 2

what does the last digit of the group number tell us about the element

Answer 2

the number of valence electrons

Question 3

physical properties of group 1 elements (2 points)

Answer 3

melting and boiling points decrease, density increases

Question 4

what is the reactivity trend down group 1

Answer 4

the reactivity increases

Question 6

what is the general equation for alkali metal and water

Answer 6

alkali metal + water -> metal hydroxide + hydrogen

Question 7

what are the physical properties of group 17 (halogens)

Answer 7

low melting boiling point, coloured

Question 8

colour and state of F2

Answer 8

pale yellow, gas

Question 9

colour and state of Cl2

Answer 9

yellow green, gas

Question 10

colour and state of Br2

Answer 10

red brown, liquid

Question 11

colour and state of I2

Answer 11

purple black, solid

Question 12

colour and state of At2

Answer 12

black, solid

Question 13

what are the trends down group 17

Answer 13

melting and boiling point increases, colour of halogens become darker

Question 14

chemical properties of halogens

Answer 14

diatomic covalent molecules, most reactive non metals, powerful oxidising agents

Question 15

reactivity trend down group 17

Answer 15

reactivity decreases

Question 16

physical properties of group 18 (noble gases) (4 points)

Answer 16

monoatomic elements, colourless at room temperature, low melting boiling points, insoluble in water

Question 17

properties of transition elements/metals (5 points)

Answer 17

high melting boiling points, high density, have variable oxidation states, form coloured compounds, good catalysts