Structure of an atom, molecules and ions

Matter

Anything that has mass and takes up space

Atom

Smallest unit of matter that forms a chemical element

Matter

Anything that has mass and takes up space

Atom

Smallest unit of matter that forms a chemical element

Difference between matter and energy

matter has mass and takes up space, energy does not

What is an isotope?

atoms with the same number of protons and electrons but different number of neutrons

How to find relative atomic mass

(Mass x abundance) + (mass x abundance) / total abundance

Molecule

A group of atoms bonded together

What are atoms made of?

protons, neutrons, electrons

How much is 1 amu in grams?

1.67 x 10^-24

mass number (atomic mass)

number of protons plus the number of neutrons in an atom of an element

atomic number

the number of protons in the nucleus of an atom

How to find number of electrons?

same as the number of protons

How to find the number of neutrons

mass number - atomic number

What is an ion?

Atoms or molecules with an overall positive or negative charge (when the number of electrons and protons are uneven)

What is the relative mass of an electron

0.00054

What is an element

A substance made up of only one type of atom

What is a compound

A substance made up of two or more bonded types of atoms.

What is a mixture

A substance made up of two or more elements or compounds not chemically bonded together.

Why do pure substances have fixed melting and boiling points?

Because their particles are identical leading to a consistent intermolecular force

Why do mixtures have varying boiling and melting points?

A mixture has two or more different elements or compounds which have different melting and boiling points, leading to different components melting at different temperatures.