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Worksheetsch 22, atomic structure
Total questions: 18
Worksheet time: 18mins
How many neutrons are in a nucleus of the nuclide?
17
20
37
54
A neutral atom consists of electrons orbiting a nucleus. The nucleus contains protons and neutrons.
Which statement about the atom must be correct?
The number of electrons is equal to the number of neutrons.
The number of electrons is equal to the number of protons.
The number of neutrons is equal to the number of protons.
The number of electrons, neutrons and protons are all different.
A certain element has several isotopes.
Which statement about these isotopes is correct?
They must have different numbers of electrons orbiting their nuclei.
They must have the same number of neutrons in their nuclei.
They must have the same number of nucleons in their nuclei.
They must have the same number of protons in their nuclei.
The figure shows the symbols for five different nuclides.
Which two nuclides are isotopes of the same element?
nuclide 1 and nuclide 2
nuclide 2 and nuclide 3
nuclide 2 and nuclide 5
nuclide 4 and nuclide 5
A proton and a neutron are each close to a positive nucleus.
How does the charge on the nucleus affect the proton and the neutron, if at all?
The neutron is attracted; the proton is repelled.
The neutron is not affected; the proton is repelled.
The proton is attracted; the neutron is repelled.
The proton is not affected; the neutron is repelled.
Below are four statements about isotopes of a certain element.
Which statement about the isotopes must be correct?
They are radioactive.
They are unstable.
They have the same number of neutrons.
They have the same number of protons.
A nucleus of element X is represented as shown. Which is an isotope of element X?
A particular nuclide has the symbol shown. What is true for atoms of this nuclide?
There are 17 nucleons in the nucleus
There are 17 protons in the nucleus
There are 37 electrons in the nucleus
There are 37 neutrons in the nucleus
A particular nuclide has the symbol shown. What is true for atoms of this nuclide?
There are 14 nucleons in the nucleus
There are 14 protons in the nucleus
There are 14 electrons in the nucleus
There are 14 neutrons in the nucleus
A nuclide has the shown symbol. What is the neutron number of a nucleus of this nuclide?
12
10
22
32
Which statement is correct for the nucleus of any atom?
The nucleus contains electrons, neutrons and protons.
The nucleus contains the same number of protons as neutrons.
The nucleus has a total charge of zero.
The nucleus is very small compared with the size of the atom.
A nuclide is represented by the shown symbol. How many neutrons are in one nucleus of the nuclide?
P
Q
P+Q
P-Q
The diagram represents a carbon atom.
What is the nucleon number (mass number) for this atom?
14
6
8
20
Which diagram could represent the structure of a neutral atom?
Which statement about the shown neutral atom is correct?
It has an equal number of neutrons and protons.
It has more electrons than neutrons.
It has more electrons than protons.
It has more neutrons than protons.
A certain element has several isotopes.
Which statement about these isotopes is correct?
They must have different numbers of electrons orbiting their nuclei.
They must have the same number of neutrons in their nuclei.
They must have the same number of nucleons in their nuclei.
They must have the same number of protons in their nuclei.
A very important experiment increased scientists’ understanding of the structure of matter.
In the experiment, particles scattered as they passed through a thin metal foil.
Which particles were used, and to which conclusion did the experiment lead?
alpha particles/matter is made up of atoms
alpha particles/atoms have a very small nucleus
beta particles/matter is made up of atoms
beta particles/atoms have a very small nucleus
T he scattering of α-particles by a thin metal foil supports the nuclear model of an atom.
Why are α-particles used rather than neutrons?
because they always travel more slowly
because they are heavier
because they are larger in diameter
because they have a positive charge
