C3.1 The Periodic Table Flashcards Preview

GCSE Chemistry > C3.1 The Periodic Table > Flashcards

Flashcards in C3.1 The Periodic Table Deck (15):
1

How did Newlands order the periodic table?

in atomic mass and in the 'law of octaves'

2

What was wrong with Newlands ordering?

Every 8th element did not have similar properties and he didn't leave gaps for new elements

3

How did Mendeleev order the leements?

in atomic number and with periods of similar properties. he also left gaps for undiscovered elements

4

Name an anomaly to the periodic table

Argon

5

What effects does having a larger number of shells have?

larger atoms can lose and gain electrons more easily

6

Why are electrons lost/gained more easily in larger atoms?

the outer electrons are further from the positive nucleus so the forces of attraction are weaker and the electrons are more easily gained or lost

7

As you go down group 1...

the reactivity increases and the atoms are larger and the boiling and melting points decrease

8

As you go down group 7...

the reactivity decreases

9

Properties of Group 1 and 2 metals

react vigorously, soft, low density

10

Property of transition elements

not very reactive, good conductors, hard, strong, high density, high melting points, don't react easily with oxygen or water, form more than one ion, used as catalysts

11

Properties of noble gases

very unreactive, difficult to combine with other elements

12

Property of non-metals

low melting and boiling points

13

Which metals in group 1 float on water?

lithium, sodium and potassium

14

alkali+water

=hydrogen +metal hydroxide

15

Properties of group 7

low melting and boiling points, poor conductors, react with metals