Biology Exams 1, 2, 3 (2022-2023)

Front

What is a cation?

Back

A cation is a positively charged ion that is formed when an atom loses one or more electrons.

Front

Which atom is most likely to form a cation with a charge of +1?

Back

An atom with two electrons in the inner shell and one electron in the outer shell is most likely to form a cation with a charge of +1.

Front

What is the definition of science?

Back

Science is the inquiry-based effort to describe and explain nature.

Front

What is the atomic number of nitrogen and how many electrons does it have in its outermost shell?

Back

Nitrogen has an atomic number of 7, which means it has 5 electrons in its outermost electron shell.

Front

What are carbohydrates primarily composed of?

Back

Carbohydrates typically include carbon (C), hydrogen (H), and oxygen (O) atoms.

Front

What is an example of an element?

Back

Carbon is an example of an element.

Front

What is the significance of the outermost electron shell in an atom?

Back

The outermost electron shell determines how an atom interacts with other atoms and its ability to form bonds.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is the role of electrons in chemical bonding?

Back

Electrons, particularly those in the outermost shell, are involved in forming chemical bonds between atoms.

Front

Define atomic number.

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.