357770
Pregunta 1
Pregunta
Name the three types of particle in an oxygen atom.
Respuesta
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protons, neutrons, electrons
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neutrons, oxygen, nucleus
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electrons, nucleus, oxygen
Pregunta 2
Pregunta
State the relative mass and charge of an electron
Respuesta
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mass = 1/200, charge negative
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mass =1/2000, charge positive
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mass = 1/2000, charge negative
Pregunta 3
Pregunta
The element boron has 5 protons. How many electrons does a boron atom have in its outer shell?
Respuesta
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1
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2
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3
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4
Pregunta 4
Pregunta
Is it the number of protons or the number of neutrons that defines each element?
Respuesta
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protons
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neutrons
Pregunta 5
Pregunta
What does the mass number represent?
Respuesta
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the number of protons in the atom
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the total number of protons and neutrons in the atom
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the number of protons and electrons in the atom
Pregunta 6
Pregunta
what does the atomic number represent?
Respuesta
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the number of protons in the atom , (the same as electrons)
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the number of neutrons and electrons
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the total number of protons, neutrons and electrons
Pregunta 7
Pregunta
Which is the correct definition of the term isotope?
Respuesta
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Isotopes are: different atomic forms of the same element, which have the SAME number of electrons but DIFFERENT number of protons
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Isotopes are: different atomic forms of the same element, which have the SAME number of protons but DIFFERENT numbers of electrons
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Isotopes are: different atomic forms of the same element, which have the SAME number of protons but DIFFERENT numbers of neutrons
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