1) most of the mass of the atom is concentrated in the nucleus. 2) the diameter of the nucleus is rather small compared to the whole atom. 3) it is where you find the protons and neutrons.
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What is the relative mass and relative charge of a(n): a) proton b) neutron c) electron
a) relative mass = 1 and relative charge = +1 b) relative mass = 1 and relative charge = 0 c) relative mass = 1/2000 and relative charge = -1
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What does the mass number tell you?
it tells you the total number of protons and neutrons in the nucleus
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What does the atomic (proton) number tell you?
this is the number of protons in the nucleus - it identifies the element. All atoms of the same element have the same number of protons
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How do you work out the number of neutrons?
mass number - atomic number
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What makes an ion: a) negative b) positive
a) more electrons than protons b) fewer electrons than protons
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What is an isotope?
an atom of the same element with different numbers of neutrons but the same number of protons
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What decides the chemical properties of an element?
it's number and arrangement of electrons
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What do the physical properties of an element depend on?
mass of the atom
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Other cards in this set
Card 2
Front
What is the relative mass and relative charge of a(n): a) proton b) neutron c) electron
Back
a) relative mass = 1 and relative charge = +1 b) relative mass = 1 and relative charge = 0 c) relative mass = 1/2000 and relative charge = -1
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