Ch. 2 Chemical Basis of Life Part 1

A pure substance made of only one kind of atom is called an _________.

• element.

• compound.

• mixture.

• solution.

Fill in the blank: The smallest particle of an element is called an _________.

• atom

• molecule

• cell

• compound

Fill in the blank: The dense core of an atom, composed of protons and usually neutrons, is called the _________.

• nucleus

• electron cloud

• valence shell

• molecule

Tags

NGSS.HS-PS1-8

A subatomic particle that has a negative charge and encircles the nucleus of an atom is called an _________.

• electron

• proton

• neutron

• positron

Fill in the blank: A subatomic particle that has no charge and is found in the nucleus of an atom is called a _________.

• neutron

• proton

• electron

• positron

Tags

NGSS.HS-PS1-8

A subatomic particle that has a positive charge and is found in the nucleus of an atom is called a _________.

• proton

• electron

• neutron

• positron

Tags

NGSS.HS-PS1-8

Fill in the blank: Atoms of the same element that have different numbers of neutrons are called _________.

• isotopes.

• ions.

• molecules.

• compounds.

Tags

NGSS.HS-PS1-8

Fill in the blank: Positively and negatively charged atoms are called _________.

• ions.

• molecules.

• atoms.

• neutrons.

Tags

NGSS.HS-PS1-3

Fill in the blank: A chemical bond resulting from the attraction between oppositely charged ions is called an _________.

• ionic bond.

• covalent bond.

• metallic bond.

• hydrogen bond.

Tags

NGSS.HS-PS1-3

A chemical bond that involves sharing a pair of electrons between atoms in a molecule is called a _________.

• covalent bond

• ionic bond

• hydrogen bond

• metallic bond

Tags

NGSS.HS-PS1-1