vocabulary
substances that undergo a chemical change
What are reactants?
a chemical bond formed between oppositely charged ions
What is an ionic bond?
Water molecules are ______ when water is a liquid compared to when water is a solid.
What is closer together?
This is one of the 7 elements that exist in nature as diatomic molecules
What is Hydrogen, Nitrogen, Fluorine, Bromine, Oxygen, Chlorine and Iodine?
Each dot in an electron dot diagram represents _____.
What is a valence electron?
an atom or group of atoms that has a positive or negative charge
What is an ion?
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.
What are Coefficients?
The name for atoms with a negative charge.
What is an anion?
A compound with 1 zinc atom and 2 chlorine atoms would have the chemical formula _____.
What is ZnCl2?
Water is a polar/nonpolar substance.
What is polar substance?
New substances formed as a result of a chemical change.
What is a product?
A chemical bond in which two atoms share one or more pairs of valence electrons
What is a covalent bond?
The name for atoms with a positive charge.
What is a cation?
Balance the following equation: N2 + H2 --> NH3
What is N2 + H2 --> 2NH3
Freely moving valence electrons are what makes metals good conductors of _____.
What is electricity?
a molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared
What is a polar molecule?
Cohesion pulls the water molecules at the surface tightly together which forms a skin-like boundary called _____.
What is surface tension?
a neutral group of atoms that are joined together by covalent bonds
What is a molecule?
If the number of each atom on each side of a chemical equation are not equal the chemical formula is said to be _____.
What is not balanced?
Bonds that form between molecules, not between atoms.
What are hydrogen bonds?
The force of attraction between molecules of the same substance so that they tend to stay together.
What is cohesion?
The force of attraction between molecules of different substances so that they tend to stick together.
What is adhesion?
In hydrochloric Acid (HCl), the shared electrons will be more attracted to the Chlorine atom because ____.
Chlorine has 17 protons in its nucleus while Hydrogen has only 1.
Balance the following equation: C + O2 --> CO
What is 2C + O2 --> 2CO2
Water is able to dissolve many substances because of its _____.
What is polarity?