WorksheetsThe Nuclear Atom
Total questions: 15
Worksheet time: 15mins
How many neutrons are in a nucleus of the nuclide?
17
20
37
54
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 neutral atom consists of electrons orbiting a nucleus. The nucleus contains protons and neutrons. Which statement about the atoms 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.
The picture 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
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
Which statement is correct for the nucleus of any atoms?
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.
Which particles are emitted during thermionic emission?
atoms
electrons
neutrons
proton
A particular nuclide of chlorine can be represented by the symbol shown in picture. How many electrons are there in a neutral atom of this nuclide?
17
20
37
54
The diagram represents a carbon atom. What is the nucleon number (mass number) for this atom?
6
8
14
20
Helium has a mass number of 3 and atomic number of 2. Which diagram represents an atom of helium?
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?
alpha particles
beta particles
gamma rays
x-rays
The scattering of alpha particles by a thin metal foil increased scientist's understanding of the structure of matter. Which conclusion did the experiment lead?
matter is made up of atoms
atoms have a very small nucleus
atom is composed of electrons surrounded by a cloud of positively charge
atoms has a small, dense , negatively charged nucleus at the center
Mass number is also known as (BLANK) number
(a)
Proton number is also known as (BLANK) number.
(a)
Isotopes are atoms of the same (BLANK) that have equal numbers of protons but different numbers of neutrons.
(a)
