₁H² and ₁H³ are:
Isotopes are atoms of the same element with different numbers of neutrons.
The neutral atoms of all of the isotopes of the same element have:
Isotopes of the same element have the same number of protons.
Consider the species \(_{17}C^{35}\) and \(_{17}C^{37}\). These species have:
These species have the same number of protons, which is characteristic of isotopes.
Atomic mass of an element is equal to:
The atomic mass is primarily the sum of the masses of protons and neutrons.
The maximum mass of an atom is concentrated in:
The nucleus contains most of the atom's mass.
Consider isotope \(_{92}U^{237}\) of uranium. The number of neutrons in it is:
The number of neutrons is calculated as \(237 - 92 = 145\).
The symbol denotes the proton number is:
The symbol \(Z\) denotes the proton number.
The number of neutron(s) in Protium is:
Protium is an isotope of hydrogen with no neutrons.
In an atom, the nucleus when compared to the extra-nuclear part, is:
The nucleus is much smaller in volume but contains most of the atom's mass.
If an element B has five protons and six neutrons, what will be the symbol of element B?
The symbol of element B is \(_{5}B^{11}\), where 5 is the atomic number and 11 is the mass number.
Which part of the atom contains protons and neutrons?
The nucleus contains protons and neutrons.
What orbits the nucleus at high speed in an atom?
Electrons orbit the nucleus at high speed.
What is the charge of a neutron?
Neutrons have no charge; they are neutral.
What do we call the total number of protons and neutrons in an atom?
The total number of protons and neutrons is called the mass number.
What is the atomic number of an element?
The atomic number is the number of protons in an atom.
What are the particles found in the nucleus of an atom?
The nucleus contains protons and neutrons.
Which of the following statements best defines an isotope?
Isotopes have the same atomic number but different mass numbers.
What part of an atom contains almost all of its mass?
The nucleus contains almost all of the atom's mass.
Who proposed one of the earliest nuclear models of the atom?
Rutherford proposed one of the earliest nuclear models of the atom.
What did Rutherford conclude from the deflection of alpha particles?
Rutherford concluded that the atom has a small, dense, positively charged nucleus.
Why is an atom usually electrically neutral?
An atom is electrically neutral because it has an equal number of protons and electrons.
Which particle has the smallest relative mass?
Electrons have the smallest relative mass among the given options.
What force holds protons and neutrons together in the nucleus?
The strong nuclear force holds protons and neutrons together in the nucleus.
What is the charge on a proton?
A proton has a charge of +1.
Which branch of physics studies the atomic nucleus?
Nuclear physics studies the atomic nucleus.
What are the fundamental components that make up protons and neutrons?
Protons and neutrons are made up of quarks and gluons.
What is the smallest part of an element that still has the properties of that element?
The atom is the smallest part of an element that retains its properties.
What makes one element different from another?
Elements are differentiated by the number of protons in their atoms.
What is the atomic number (Z) of nitrogen?
The atomic number of nitrogen is 7.
What does the atomic number of an element tell us?
The atomic number tells us the number of protons and, in a neutral atom, the number of electrons.
What is the nucleon number of an atom?
The nucleon number is the total number of protons and neutrons in an atom.
What are protons and neutrons collectively called?
Protons and neutrons are collectively called nucleons.
What is the formula to find the atomic mass (A)?
The atomic mass \(A\) is given by the sum of the number of protons \(Z\) and the number of neutrons \(N\).
What are isotopes?
Isotopes are atoms of the same element with different numbers of neutrons.
Which of the following correctly describes hydrogen isotopes?
Hydrogen isotopes all have one proton but differ in the number of neutrons.
What stays the same in all isotopes of a given element?
The atomic number, which is the number of protons, stays the same in all isotopes of a given element.
Which of the following is an isotope of hydrogen with 2 neutrons?
Tritium is an isotope of hydrogen with 2 neutrons.
What is the atomic mass of Deuterium?
The atomic mass of Deuterium is 2.
Why do isotopes of the same element have similar chemical properties?
Isotopes have similar chemical properties because they have the same number of electrons.