MCQs of Biology – Atoms

The smallest unit of an element that retains all the properties of the elements is?

In atoms, protons and neutrons are present:

What is the purest form of matter that can not be separated into different substances by chemical means?

When an atom ionizes, what happens?

Which of the following statements is not true?

Which of these particles determine the chemical properties of an atom?

Electrons carry ___________ charge:

The electrons of an atoms;s outermost shell are called its __________ electrons:

Which of the following is the smallest in volume?

Which of the following applies to a neutron?

Changing the number of ________ would change it into an atom of a different element:

The reason liquid nitrogen evaporates so easily is that it lacks:

When an atom gives up an electron and acquires a positive charge, it is called a /an:

The number and arrangement of electrons in atom’s outer energy level determines the atom’s:

Atoms of different phosphorus isotopes:

An atom that normally has ________ in its outer shell would tend not to form chemical bonds with other atoms:

The orbits comprising an atom’s valence electron shell:

A suphur atom has 6 electrons in its outer shell as a result: it forms ________ covalent bonds with other atoms:

An ion is formed when an atom:

Whic of the following substances does not play a role in normal human physiology?

The ionization of a sodium atom to produce Na+ is an example of:

Which of the following is a trace element required only in small amounts by most living things:

Your body contains the smallest amount of which of the following:

Role of molybdenum is:

Isotopes of an element differ from each other in the number of :

Which of the following facts allows you to determine that atom A and atom B are isotopes of the same element?

Which of the following elements is mismatched with its properties or function?

Sodium and potassium behave similarly in chemical reactions. This is because: