Group 1

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13 Terms

1

Name for Group 1 elements

Alkali metals

<p>Alkali metals</p>
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2

Pattern in reactivity down group 1

Reactivity increases

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3

Density of group 1

low density, which decreases down group 1

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4

Conductivity of group 1

good conductors of heat and electricity

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5

Appearance of group 1 elements

shiny when cut, but tarnish as they react with oxygen

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6

Colour of group 1 compounds

White solids/colourless solutions

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7

Metal + water -->

metal hydroxide + hydrogen

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8

Observations: Sodium + Water

Floats on surface, melts into a bowl, fizzes, moves on the surface of the water

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9

Observations: Sodium + chlorine

Burns with a yellow flame, producing a white compound

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10

Observations: Lithium + water

Floats on the surface of the water, moves around and fizzes

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11

Observations: Potassium + water

Floats on the surface of the water, moves around, fizzes, melts into a ball, burns with a lilac flame.

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12

When group 1 elements react

they lose their outer electron

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13

Potassium is more reactive than sodium because

atomic radius increases, shielding increases, nuclear attraction decreases, easier to lose an electron

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