GCSE revision Pt2

Which element has the electron configuration of 2.7?

• Krypton
• Iodine
• Flourine
• Barium

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NGSS.HS-PS1-1

When an atom loses an electron, it becomes a:

• positive ion
• negative ion
• neutral ion
• neutral atom

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NGSS.HS-PS1-2

Nitrogen will ____ electrons to become stable.

• gain 1

• lose 1

• gain 3

• lose 3

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Is Hydrogen considered a metal or a non-metal?

• Metal
• Non-metal

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NGSS.HS-PS1-1

How are covalent bonds explained?

• When one atom takes the other atom's electron
• When the atom shares an electron with an another atom
• When the two nucleus merge
• When the neutrons leave the nucleus

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NGSS.MS-PS1-1

What region of the periodic table contains atoms that form covalent bonds?

• the left side
• the middle
• the right side
• top left

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the mass number of magnesium?

• 2

• 4

• 12

• 24

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NGSS.HS-PS1-8

What is the relative formula mass of NaOH?

• 20
• 39
• 40
• 45

Which alkali metal is most reactive out of the following?

• rubidium

• potassium

• sodium

• lithium

What happens to the reactivity of the alkali metals as you move down the group?

• increases

• decreases

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NGSS.HS-PS1-1

NGSS.HS-PS1-2