Atomic Structure Question Preview (ID: 61118)


Atomic Structure Day 1. TEACHERS: click here for quick copy question ID numbers.

Which of the following has a positive charge?
a) proton
b) neutron
c) anion
d) electron

Consider the species 72Zn, 75As and 74Ge. These species have
a) the same number of electrons.
b) the same number of protons.
c) the same mass number.
d) the same number of neutrons.

The neutral atoms of all of the isotopes of the same element have
a) the same number of electrons
b) different numbers of protons.
c) equal numbers of neutrons.
d) the same masses.

An atom of sodium has an atomic number of 11 and a mass number of 23. Which of the following statements is correct?
a) An atom of sodium has 11 protons, 11 electrons, and 11 neutrons.
b) An atom of sodium has 11 protons, 12 electrons, and 11 neutrons.
c) An atom of sodium has 11 protons, 11 electrons, and 12 neutrons.
d) An atom of sodium has 11 protons, 12 electrons, and 12 neutrons.

An atom of phosphorus has an atomic number of 15 and a mass number of 31. How many neutrons does it contain?
a) 15
b) 16
c) 31
d) 20

What is the chemical symbol for magnesium?
a) Ma
b) Mn
c) M
d) Mg

The mass of a single atom of a particular isotope is called which of the following?
a) Its atomic number
b) Its atomic weight
c) Its atomic mass
d) Its relative atomic mass

The identity of a chemical element is determined by which of the following?
a) The number of protons it possesses
b) The number of neutrons it possesses
c) The number of electrons it possesses
d) The sum of the number of protons and neutrons it possesses

Complete the following sentence: 'Different isotopes of the same element have...'
a) ...the same number of protons, but differing numbers of neutrons and electrons
b) ...the same number of neutrons, but differing numbers of protons and electrons
c) ...the same number of protons and neutrons, but differing numbers of electrons
d) ...the same number of protons and electrons, but differing numbers of neutrons

what is the atomic number of Nitrogen
a) 4
b) 7
c) 28
d) 15

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