Periodic Table
What is this element called? Se
Selenium
Anything that has mass and takes up space is...
matter
What is an electron?
A negatively charged particle in an atom
What is the left side of the chemical equation called/have?
Reactants
Sharing electrons is called...
Covalent bond
What are Group 1 elements known as?
Alkali metals
The SI unit for amount of a substance
Mole
What does atomic number mean?
The number of protons in an atom
To balance chemical reactions, the numbers in front of compounds are called
coefficients
PV = nRT is known as ...
The ideal gas law
He, Ne, and Ar are part of a group known as...
Noble gases
6.022 *10^23 is also known as...
Avogadro's number
Protons and neutrons can be found in this part of the atom.
The nucleus
When a substance gains electrons, it undergoes...
Reduction
The temperature at which a liquid becomes a gas is called...
boiling point
Electronegativity increases from...
Left to right
The density formula is
What are isotopes?
Atoms of the same element but with different neutron amounts.
A reaction that releases heat is called...
exothermic
A bond formed by the transfer of electrons
ionic bond
Metalloids
A pure substance that is made up of only one type of atom
element
What is atomic mass?
Average mass of naturally occurring isotopes of an element.
Law of conservation of mass states that...
Matter cannot be created or destroyed.
Atoms lose, gain, or share electrons to reach this stable configuration.
Full valence shell