Atoms & Isotopes

Front

Which of the following statements regarding subatomic particles is incorrect? Options: Protons are positively charged particles and neutrons have no charge., The relative mass of the proton, electron and neutron the same., In a neutral atom the number of protons equals the number of electrons., Isotopes of an element have the same number of protons but a different number of neutrons.

Back

The relative mass of the proton, electron and neutron the same.

Front

Which subatomic particle is used to identify the atom, as it never changes? Options: protons, neutrons, electrons

Back

protons

Front

Which of the following particle pairs has approximately the same mass? Options: protons and neutrons, protons and electrons, neutrons and electrons, protons, neutrons and electrons

Back

protons and neutrons

Front

When is an atom electrically neutral?

Back

protons and electrons are the same

Front

How many neutrons does iron-60 (atomic number 26) have?

Back

34

Front

How many protons does this isotope of titanium have? Hint: titanium has an atomic number of 22.

Back

22

Front

How many neutrons does this bromine atom have?

Back

45

Front

If the number of electrons in an atom changes you make a(n) __________________.

Back

ion

Front

How many electrons are in an atom with atomic number 34, mass number 74, and a charge of -2?

Back

36

Front

If an atom has more electrons than protons, it is a(n)

Back

Negative ion