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Chemistry C3 > Periodic Table > Flashcards

Flashcards in Periodic Table Deck (15):
1

Newlands arranged his periodic table how?

order of atomic mass and similarities every 8th element.

2

why did newlands idea not work?

not all properties every 8th where the same?

3

what was unique about Mendeleev's periodic table?

he left gaps where there where undiscovered elements

4

what did Mendeleev's periodic table allow him to do?

predict the atomic masses and properties of undiscovered elements.

5

how is the modern periodic table arranged?

on atomic numbers.

6

group 1 is known as what?

alkali metals

7

properties of group 1

- low density
- react with water to make hydrogen
- form hydroxides that dissolve in water, gives alkali solution.

8

transition metals are have what boiling and melting points?

much higher melting and boiling points than group 1

9

transition metals are often

harder and stronger than group 1 metals and less reactive too

10

transition metals are what as catalysts?

useful as catalysts.

11

transition metals can form what compounds?

coloured compounds.

12

group 7 elements are known as

halogens

13

when a group 7 atom produces an ion it is known as a

halide

14

the further down group 1 the

- less reactive the element is
- higher the melting and boiling points

15

the higher the energy level of the outer electron shell the

more easy electrons are lost, the less easy electrons are gained.