chemistry Q 1-3 What are the three particles that atoms consist of? Which of the

Question

chemistry Q 1-3 What are the three particles that atoms consist of? Which of the particles referred to in part (a) comprise most of an atom's mass? Which of the particles referred to in part (a) are electrically charged? Identify their charges (positive/negative is sufficient). Where are the particles referred to in part (a) located in an atom? (It isn't necessary to refer to things like orbitals at this point.) Fill in the blanks. The number of protons in an atom is called its number. The number of protons plus neutrons in an atom is called its number. All atoms of the same element have the same Atoms of the same element that have different numbers of neutrons are called How many protons and neutrons are in one atom of oxygen-18?

Explanation / Answer

1) a) three particles are proton, neutron and electron

b) proton and neutron

c) proton = positive charge

electron = negative charge

d) proton and neutron present in nucleus. electron present around the nucleus

2) a) atomic number

b) mass number

c) atomic number

d) isotones

3) protons: 8

neutrons: 10

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