It is in the middle of the atom and contains protons and neutrons. It also has a positive charge. Almost the whole mass of the atom is concentrated in the nucleus
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What are electrons?
They move around the nucleus and are negatively charged. They are arranged in shells around the nucleus.
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What are the relative masses and charges of protons, neutrons and electrons?
What are the number of protons always equal to in a neutral atom?
What are the number of protons always equal to in a neutral atom?
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What are the symbols for solid, liquid, gas and desolved in water?
s (solid) l (liquid) g (gas) aq (desolved in water)
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What flame colours do lithium, sodium and Potassium produce?
red (lithum) yellow/orange (sodium) lilac (potassium)
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What is a line spectrum?
When heated electrons become excited and produce light energy. The wavelenghts can be recorded as a line spectrum. Different elements have different wavelenghts due to each element having a different electron arrangment.
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What is the practial technique used to produce line spectrums?
Spectroscopy
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Other cards in this set
Card 2
Front
What are electrons?
Back
They move around the nucleus and are negatively charged. They are arranged in shells around the nucleus.
Card 3
Front
What are the relative masses and charges of protons, neutrons and electrons?
Back
Card 4
Front
What are the number of protons always equal to in a neutral atom?
Back
Card 5
Front
What are the symbols for solid, liquid, gas and desolved in water?
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