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Chemistry quiz

Term 1 science test

QuestionAnswer
What are the three subatomic particles? Electrons, Protons and Neutrons
How do elements differ? The amount of protons they have determines the element
What is the mass number? Sum of protons and neutrons
When elements combine in specific ratios, what do they form? Compounds
What charge does the nucleus have? Positive
What is a horizontal row on the periodic table called? A Period
What is a vertical column on a periodic table called? A group
Why don't noble gases/inert gases react to much? They have a complete outer shell
What group is the most reactive? Halogens
What is another name for outer electrons? Valence electrons
What does a Lewis Dot Diagram show? Valence electrons
What are ions? Charged atoms
Why do atoms bond? So they can become more stable by having less energy (complete their outer shell
What is ionic bonding? The transfer of e-'s
Why don't ionic compounds conduct electricity in the solid state? The ions are fixed in position (strong ionic bonds) and are not free to move
Why can ionic compounds, when dissolved in water, can conduct electricity? The ions are separate and are free to move
Created by: heyhannah
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