C9) The Periodic Table

Question 1

what trend do the collection of lithium, sodium, and potassium in Group I show?

Answer 1

a collection of relatively soft metals showing a trend in melting point, density, and reaction with water.

Question 2

a collection of diatomic non-metals showing a trend in colour and physical state (in group VII) are…..

Answer 2

halogens, chlorine, bromine, and iodine

Question 3

what are transition elements?

Answer 3

a collection
of metals having high densities, high melting
points and forming coloured compounds, and
which, as elements and compounds, often act as
catalysts

Question 4

what are noble gases?

Answer 4

unreactive, monoatomic gases (Group VIII)

Question 5

what’s the use of noble gases?

Answer 5

proving an inert atmosphere

Question 6

what are some example of where noble gases can be used?

Answer 6

• argon in lamps
• helium for filling balloons

Question 7

what are the names of elements that display properties of both metals, and non-metals?

Answer 7

metalloids

Question 8

what side of the periodic table are most NON-metals?

Answer 8

right side

Question 9

The metallic character diminishes (decreases) moving ____ to _____ across the Periodic Table

Answer 9

left to right

Question 10

what’s a “period” in the periodic table?

Answer 10

horizontal rows that show the number of shells of electrons an atom has and are numbered from 1 - 7

Question 11

what’s a “group” in the periodic table?

Answer 11

vertical columns that show how many outer electrons (also known as valency electrons) each atom has and are numbered from I – VII

Question 12

what is a valency?

Answer 12

valency tells you how many bonds an atom can make with another atom or how many electrons its atoms lose, gain or share, to form a compound

Question 13

what is the valency of carbon?

Answer 13

4. (as it is in Group IV so a single carbon atom can share 4 electrons to make 4 single bonds or 2 double bonds)

Question 14

where in the periodic table are elements which display properties of both metals and non-metals?

Answer 14

Between the metals and the non-metals

Question 15

what type of oxides are metals?

Answer 15

basic oxides ( a few are amphoteric)

Question 16

what type of oxides are non-metals?

Answer 16

acidic oxides (some are neutral)

Question 17

metals = good conductors or poor conductors?

Answer 17

good conductors of electricity

Question 18

non-metals = good conductors or poor conductors?

Answer 18

poor conductors of electricity

Question 19

do metals react with acid?

Answer 19

yes, (many do)

Question 20

do non-metals react with acids?

Answer 20

no, they do not react with acids

Question 21

how can you find out the number of outer shell electrons from the given group number?

Answer 21

no. of outer shell electrons = group number

Question 22

how many electrons does carbon have in its outer shell?

Answer 22

4
(group 4 = 4 outer electrons)

Question 23

what do transition elements form?

Answer 23

coloured compounds (often acting as catalysts.

Question 24

why do noble gases not take part in chemical gases?

Answer 24

The atoms of noble gases already have complete outer shells, so they have no tendency to lose, gain, or share electrons. (= inert)

Question 25

give one example of a transition element

Answer 25

silver/gold/platinum/copper

Question 26

where are transition elements found on the periodic table?

Answer 26

The transition elements occupy the short columns in the center of the periodic table, between Group 2A and Group 3A.

Question 27

what is the valency of calcium?

Answer 27

2

Question 28

what is the valency of chlorine?

Answer 28

1