The Atom 8 Question Preview (ID: 51049)


Chemistry Atom. TEACHERS: click here for quick copy question ID numbers.

The charge of an electron cloud is equal to:
a) Number of electrons × relative charge of an electron.
b) Number of protons × relative charge of a proton.
c) Number of neutrons × relative charge of a neutron.
d) Charge of nucleus.

When an atom loses electrons it forms:
a) An anion.
b) A negatively charged ion.
c) A positively charged ion.
d) None of the choices

The larger the atomic number (Z) the larger is the:
a) Atomic number
b) Number of neutrons
c) Number of electrons.
d) All of the choices.

Neutrons are:
a) Neutral particles.
b) Found in the nucleus.
c) Determined by N = A – Z.
d) All of the choices.

The two atomsX(Z=18, A=40) and Y(Z=20, A=40) are:
a) Atoms of the same element.
b) Atoms of different elements.
c) Isotopes.
d) Allotropes.

The nuclear charge of the tritium atom,H(Z=1, A=1) is
a) 1+
b) 2+
c) 3+
d) 4+

The three atoms protium, H(Z=1, A=1), deuteriumH(Z=1, A=2) and tritium H(Z=1, A=3)are:
a) Atoms of the same element.
b) Atoms with same number of electrons.
c) Isotopes
d) All of the choices.

In the calcium atom,Ca(Z=20, A=40) there are
a) 20 protons, 20 electrons and 20 neutrons
b) 20 protons, 40 electrons and 20 neutrons
c) 20 protons, 40 electrons and 40 neutrons
d) 20 protons, 20 electrons and 60 neutrons

For an atom X(Z,A)A is the:
a) Electrons Number
b) Protons number
c) Atomic number
d) Mass number

In the argon atom,Ar (Z=18, A=40)the number of neutrons is:
a) 18
b) 40
c) 22
d) 58

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