The positively charged particle of an atom, located in the nucleus
What is a proton
100
any pure substance that cannot be broken down into a simpler one by a chemical reaction.
What is an element
100
A chemical bond in which a hydrogen atom of one molecule is attracted to an electronegative atom, especially a nitrogen, oxygen, or flourine atom, usually of another molecule
What is hydrogen bond
100
Water’s __________ _________ _______ allows large bodies of water to absorb large amounts of heat with only small changes in temperature.
What is high specific heat capacity
100
a substance produced in a chemical reaction
What are products?
200
the negatively charged particle that orbits the nucleus of an atom
What is an electron
200
a substance formed by the chemical combination of elements in fixed proportions
What is a compound
200
A chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms
What is a covalent bond?
200
In what state does water become more dense and float
What is solid (ice)
200
a substance that reacts with
another in a chemical reaction
What are reactants?
300
the neutral particle of an atom that is located in the nucleus. Has a mass equal to a proton
What is a neutron
300
a substance consisting of two or more substances mixed together and uniformly dispersed, most commonly the result of dissolving a solid, fluid, or gas in a liquid
What is a solution
300
A chemical bond between two ions with opposite charges
What is an ionic bond
300
Hydrogen bonds are very
What is weak
300
a measure of acidity or alkalinity in which the pH of pure water is 7, with lower numbers indicating acidity
and higher numbers indicating alkalinity
What is pH?
400
the number of protons in the nucleus of an atom of an element and its isotopes
What is atomic mass (includes the isotopes which have more neutrons)
Atomic Number is the number of Protons (or # of Electrons)
400
a substance that dissolves another to form a solution
What is a solvent
400
the molecular force between particles within a body or substance that acts to unite them
What is cohesion
400
Water is considered to be the universal _________ because many substances dissolve in it
What is solvent
400
the smallest physical unit of a substance that can exist independently, consisting of one or more atoms
held together by chemical forces
What is a molecule?
500
each of two or more forms of a chemical element with the same atomic number but different numbers of neutrons
What is an Isotope
500
the substance dissolved in a given solution
What is solute
500
the molecular force of attraction in the area of contact between unlike bodies that acts to hold them together
What are is adhesion?
500
The pH of water is
What is 7
500
the smallest portion into which an
element can be divided
and still retain its properties