Periodic table

1
Periodic table

• Answers
• Activity 6-F
• Pages 219, 220 et 221

2
Part 1

• Beryllium Be Z 4
• Boron B Z 5
• Carbon C Z 6
• nitrogen N Z 7
• Oxygen O Z 8
• Fluorine F Z 9
• Neon Ne Z 10

3
Part 1- Analyze

• Silicon Si.
• Because Si is under C.
• Phosphorus P.
• Because P is after Si.
• Sodium Na.
• It is in row 3 under Be.

4
Part - 2

• The elements of group 2 are
• - Beryllium Be
• Magnesium Mg
• Calcium Ca
• Strontium Sr
• Baryum Ba
• Note For names, see page 562

5
Part - 2

• The symbols
• - Beryllium Be Z 4
• Magnesium Mg Z 12
• Calcium Ca Z 20
• Strontium Sr Z 38
• Barium Ba Z 56
• The atomic number of Barium is the biggest. It is
  in the bottom of group 2.
• In a group, the atomic number increases from top
  to bottom.

6
Part - 2

• Barium.
• Its atom contains more protons and neutrons.
• In a group, the atomic mass increases from top
  to bottom.
• 4. Barium.
• Its mass increases with respect to its volume.
• http//www.chemicool.com/

7
Part 2 Analyze

• Elements of the same group
• Boron B
• Aluminum Al
• Gallium Ga
• Indium In
• Thallium Tl
• Hydrogen H
• Lithium Li
• Sodium Na
• Potassium K
• Rubidium Rb
• Cesium Cs

8
Part 2 Analyze

• Carbon C
• silicon Si
• Germanium Ge
• Tin Sn (Stannum)
• Lead Pb
• Copper Cu, Silver Ag et Gold Au (aurum)
• Yes, they are in the same group, Group 11 (from
  the left to the right).
• Yes, because they are in the same column and
  they are the coinage metals (to make coins).
• 3. Platinum Pt is in group 10 (from the left to
  the right). Gold Au is in group 11.
• No, because they are precious metal.

9
Part - 3

• Elements of periods 2 and 3
• Li Be B C N O F Ne
• Na Mg Al Si P S Cl Ar
• None of them appears in periods 2 and 3.
• The only liquid elements are
• Bromine Br, in period 4
• Mercury Hg (hydrargyrum), in period 6

10
Part - 3

• The gases
• Chlorine Cl is underneath Fluorine F.
• No, in period 4, 5
• Argon Ar is underneath Neon Ne.
• yes, inperiod 4, 5 et 6

11
Part 3 Analyze

• The state of a substance (solid, liquid or gas)
  is a physical property. The Periodic Table is
  based on the chemical properties.
• If one element in a group is a gas, the other
  elements of this group should notbe all gases.
• a) The group number of halogens is 17.
• b) Mendeleev had found taht the chemical
  properties of Tellurium are different fromthe
  chemical properties of Iodine.
• Mendeleev put Iodine with the halogens because
  it has the same chemical properties of them.

12
Groups names

• Group 1 Alkali Metals
• Group 2 Alkali Earth Metals
• Group 13 Earth Metals
• Group 14 Dracogens
• Group 15 Pnictogens
• Group 16 Chalcogens
• Group 17 Halogens
• Group 18 Noble gases