Bonds
A chemical bond in which 2 atoms share one or more pairs of valence electrons.
Covalent Bond
When an atom loses an electron it forms a(n)
Cation
A notation indicating the elements in a compound and the ratios of the atoms of each element (Ex. H2O)
Chemical formula
Numbers that appear before a formula in a chemical equation to show how many atoms or molecules of each reactant or product are involved in the reaction.
Coefficients
The force of attraction between molecules of the same substance so that they tend to stay together
Cohesion
A chemical bond formed between oppositely charged ions.
Ionic bond
When an atom gains an electron it becomes a(n)
Anion
carbon + oxygen ———> carbon dioxide
“carbon + oxygen” represent _____________
Reactants
How many atoms of each element are in this molecule:
Mg2SiO4
2 magnesium, 1 silicon, and 4 oxygen
THe force of attraction between molecules of different substances so that they tend to stick together.
Adhesion
Two identical atoms of the same element bonded together. There are 7 elements that exist in nature this way.
Homonuclear diatomic molecules
An atom or group of atoms that has a positive or negative charge
Ion
New substances formed as a result of a chemical change
Products
Balance this equation
NO2 —> NO + O2
2 NO2 —> 2 NO + O2
A bond where the electrons are not shared equally; resulting in a more positive side and more negative side.
Polar Covalent Bond
When two atoms share two pairs of electrons.
Double bond
THis suffix is added to the first part of an element when an anion is created.
—ide (Ex. Chloride)
A representation of a chemical reaction using chemical formulas for the reactants and products (Ex. C + O2 —> CO2)
Chemical Equation
One of the most common household cleaners is ammonia, which has a chemical formula of NH3. How many atoms are in a molecule of ammonia?
4
A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared.
Polar molecule
Bond occurring when positive hydrogen atoms of one molecule are attracted to negative atoms of nearby molecules.
Hydrogen Bond
This group of metals easily give up their valence electron to achieve the more stable electron configuration of the noble gases.
1A—Alkali metals
A model of an atom in which each dogs represents a valence electron.
Electron Dot Diagram
Balance this chemical equation:
CH4 + O2 —> CO2 + H2O
CH4 + 2 O2 —> CO2 + 2 H2O
C=1
H=4
O=4
The cohesion between water molecules and the adhesion between water molecules and the cells of the xylem tubes of trees make this type of water movement possible.
Capillary action