Which of the following statements about subatomic particles is TRUE?
A)A neutral atom contains the same number of protons and electrons.
B)Protons have about the same mass as electrons.
C)Electrons make up most of the mass of an atom.
D)Protons and neutrons have opposite, but equal in magnitude, charges.
E)Neutrons and electrons are found in the nucleus of an atom.
Elements Are Composed Of Three Subatomic Particles .Which Of The Following Statements About These Particles Is Not True ?
Which Is True About Subatomic Particles?
Answer to question 1
Let us look at each statement.
A. A neutral atom is achieved when there is an equal number of protons (positively charged) and electrons (negatively charged). Hence, this statement is CORRECT.
B. Electrons have a mass of 0.00055 atomic mass unit while protons have a mass of approximately 1 atomic mass unit. Thus, they have different masses. The statement is INCORRECT.
C. With electrons weighing way less than the mass of protons and as well as neutrons, its contribution to the mass of an atom is deemed negligible. Hence, the statement is INCORRECT.
D. Protons have a positive charge while neutrons are neutrally charged. Hence, they are not of opposite charges. The statement is INCORRECT.
E. Protons and neutrons make up the nucleus. Thus, this statement is INCORRECT.
The correct answer is choice A.
Answer to question 2
The third statement which says that nucleus consist of electrons and protons is not correct as nucleus contains neutron and protons only .
Answer to question 3
True statement about subatomic particles is
option (4) Subatomic particles are smaller than atom is the correct answer.
Protons , electrons and neutrons are not only subatomic particles. For example , quark is sub atomic particle of protons.
Subatomic particles are larger than atoms is false statement . Since atom is made up of subatomic particles.
All subatomic particles must have electrical charge is false statement. Since , neutron subatomic particles of atom have no charge.