Chemical-Bond Terms
Substances that undergo a chemical change.
What is a reactant?
The chemical formula for water
What is H20?
Two parts of an atom that have opposite charges.
What are protons and electrons?
A force of attraction between atoms or groups of atoms.
What is a chemical bond?
Formula for table salt (sodium chloride).
What is NaCl?
A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared.
What is a polar molecule?
Water forms droplets because of the ________ _________ between water molecules.
What is cohesive attraction?
The charge of an electron is _________.
What is negative?
A chemical bond formed between oppositely charged ions.
What is an ionic bond?
Formula for potassium bromide.
What is KBr?
A notation indicating the elements in a compound and the ratios of the atoms of each element.
What is a chemical formula?
Measuring water in a measuring cup forms this shape on the water surface.
What is a U shape?
Protons are located in the ________.
What is the nucleus?
A chemical bond in which two atoms share one or more pairs of valence electrons.
What is a covalent bond?
Formula for magnesium chloride.
What is MgBr2?
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 is coefficients?
Type of water movement caused by cohesion and adhesion.
What is capillary action?
Silicon's Atomic Number is 14. The number of electrons in its outer shell is _______?
What is 4?
When two atoms share two pairs of electrons.
What is a double bond?
Formula for lithium chloride.
What is LiCl?
New substances formed as a result of a chemical change.
What is products?
A water strider can skate across the top of a pond because of ________ ________.
What is surface tension?
An atom gains an electron to form an ______.
What is an anion?
Bonds that form between molecules, not between atoms.
What is a hydrogen bond?
Formula for hydrochloric acid.
What is HCl?