group 1 (alkali metals) (C3) Flashcards Preview

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Flashcards in group 1 (alkali metals) (C3) Deck (20):
1

how many electrons does the element have in its outer shell?

1 electron

2

what colour do the elements turn universal indicator?

purple

3

what 4 things happen the further down the group you go?

-reactivity increases
- atom size increases
- boiling point decreases
- melting point decreases

4

why is it easier to loose electrons than gain electrons?

because of the shielding effect of other electrons

5

what is there less of in these elements?

electrostatic force

6

What are the first 3 elements in this group? (in order going downwards)

Lithium (Li)
Sodium (Na)
Potassium (K)

7

how do the elements react with water (which are less dense)?

vigorously

8

When reacted with water what are the 2 products?

hydrogen and metal hydroxide

9

What is the word equation when lithium is reacted with water?

lithium + water -> hydrogen + lithium hydroxide

10

What is the balanced symbol equation for when lithium is reacted with water?

2Li (s) + 2H^2O (l) -> H^2 (g) + LiOH (aq)

11

what density do all the elements have?

a low density

12

which elements are less dense than water?

the first 3 (lithium, sodium, and potassium)

13

what do the elements react with?

non metals?

14

when reacting with non-metals what kind of compounds are formed?

ionic compounds

15

what charge do the ionic compounds have?

+1

16

what colour are the compound solids?

white

17

when the compound solids are dissolved in water what colour is the solution?

colourless

18

what happens the further down the group you go?

the more shells of electrons

19

why do elements get more reactive the further down the group you go?

the layers of electrons shield the nucleus from reacting. the lone electron on the outer shell is further away from the nucleus. this means it becomes easier to loose an electron.

20

what happens to reactivity as you go down the group?

it increases