Chapter 2: The Nature of Molecules - part 1

Proton's electrical charge

+1

electron's electrical charge

-1

neutron's electrical charge

0

An electrically neutral atom has an atomic number of 11 and an atomic mass of 23. This atom has ________ protons, ________ neutrons, and ________ electrons

11, 12, 11

An atom has 11 protons, 12 neutrons, and 10 electrons. This atom has and atomic number of ________, an atomic mass of ________, and an overall charge of ________.

11, 23, -1

An electrically neutral atom has an atomic number of 6 and an atomic mass of 14. This atom has ________ protons, ________ neutrons, and ________ electrons

6, 8, 6

An atom has 8 protons, 9 neutrons, and 8 electrons. This atom has an atomic number of ________, and atomic mass of ________, and an overall charge of ________.

8, 17, 0

Electrons

Atoms are composed of a central nucleus which is surrounded by which orbiting particles?

Hydrogen or Protium

Atoms that usually have no neutrons

Subatomic particles called ________ can be found at various distances from the nucleus

Electrons

The three main types of subatomic particles are

Electrons, neutrons, and protons

What atoms always have one proton

Hydrogen

Which subatomic particles are located in the nucleus of an atom?

Neutrons and Protons

Atoms are composed of a central ________ which is surrounded by orbiting ________

Nucleus / electrons

Among subatomic particles, each ________ has a charge of +1, each ________ has a charge of -1, and each _______ has no charge

Proton, electron, neutron

Atoms of the same element always have the same number of ________ in the nucleus, and this number is unique for that element

Protons

In the simple "Bohr model", the tan spheres represent what?

Protons

The atomic mass of an atom is equal to the sum of the masses of its ________ and ________

Protons and neutrons

Atoms of different chemical elements can be differentiated based on the number of

Protons in the nucleus

All atoms are composed of several of ________ particles. A proton is and example of suck a particle

Subatomic

If two atoms belong to the same element, what must be true?

They must have the same number of protons

A "dalton" is a unit of measurement for measuring

mass

Anything that has mass and occupies space is defined as

matter

Atomic number refers to the number of

protons in the nucleus / protons

Atoms are composed of

subatomic particles

protons, neutrons, electrons

subatomic particles

an element

A substance that cannot be broken down into simpler substances by ordinary chemical means

The green sphere in the simple "Bohr model" represent what?

An electron

If two atoms have the same number of protons in their nucleus, you can conclude for sure that they

Are atoms of the same element