Atomic Structure Quiz (Open Notes)

The nucleus is found at the ............. of an atom

• center

• electron cloud

• outside

• side

Answer explanation

The nucleus is found at the center of an atom, containing protons and neutrons, while the electron cloud surrounds it. Therefore, the correct answer is 'center'.

Neutrons have...

• no charge

• + charge

• - charge

• both + and - charge

Answer explanation

Neutrons are subatomic particles found in the nucleus of an atom and are known for having no charge. This distinguishes them from protons, which have a positive charge, and electrons, which have a negative charge.

Protons have...

• + charge

• - charge

• both + and - charge

• 0 charge

Answer explanation

Protons are positively charged particles found in the nucleus of an atom. Therefore, the correct answer is that protons have a + charge.

Electrons have...

• • + charge

• • - charge

• both + and - charge

• 0 charge

Answer explanation

Electrons are subatomic particles that carry a negative charge, denoted as -1. This is why the correct answer is '- charge', as they do not possess a positive charge or neutral charge.

How many protons are in this atom?

• 6

• 12

• 8

• 12.01258

Answer explanation

The number of protons in an atom is equal to its atomic number. For carbon, which has an atomic number of 6, there are 6 protons. Therefore, the correct answer is 6.

The atomic number determines the... of an atom

• identity

• mass

• electrons

• neutrons

Answer explanation

The atomic number of an atom is defined as the number of protons it contains, which determines its identity as a specific element. Therefore, the correct answer is 'identity'.

A pure substance consisting of atoms only with the same atomic number

• element

• compound

• isotope

• molecules

Answer explanation

An element is a pure substance made up of only one type of atom, characterized by a specific atomic number. Compounds consist of different atoms, isotopes are variations of elements, and molecules are groups of atoms.

A neutral substance consisting of more than one atom bonded together.

• element

• compound

• isotope

• molecules

Answer explanation

A molecule is a neutral substance made up of two or more atoms bonded together. Unlike elements, which consist of a single type of atom, molecules can be composed of different atoms, making them the correct choice.

A substance containing atoms of different elements bonded together.

• element

• compound

• isotope

• molecules

Answer explanation

A compound is a substance formed when atoms of different elements bond together, distinguishing it from an element, which consists of only one type of atom. Therefore, the correct answer is 'compound'.

Water is an element

• True

• False

Answer explanation

Water is not an element; it is a compound made of two hydrogen atoms and one oxygen atom (H2O). Therefore, the correct answer is False.