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Water/ BC/ Acid

Basic Chemistry

QuestionAnswer
atomic number number of protons in the nucleus
atomic mass number of protons plus number of neutrons
electrons fill first shell 2
electrons fill second shell 8
electrons fill third shell 8
element a substance that cannot be broken down to other substances
compound two or more elements in a fixed ratio
atom smallest unit of matter that retains the properties of an element
isotope two atoms of the same element that have a different number of neutrons. Radioactive
solute in a solution dissolved in the solvent
solvent in a solution fluid that dissolves the soluteq
Na p=11 n=12
Mg p=12 n=12
Al p=13 n=14
P p=15 n=16
S p=16 n=16
Cl p=17 n=18
K p=19 n=20
Ca p=20 n=20
cohesion holding together of like substances-- like substances attach
adhesion holding together of different substances-- different substances attach
surface tension water attaches to itself with hydrogen bonds and forms a skin on the surface that can support small objects that are heavier than water
why does a metal paperclip float on water? because of surface tension
why does water climb up a papertowel? because of capillary action
acid pH value below 7
base pH value above 7
how can an acid harm a protein (enzyme)? they disrupt the makeup of protein molecules used for structure and chemical reactions
why do water and oil not mix? because water more attracted to itself than oil (cohesion)
why does water slide around on wax paper and stick to brown paper? because wax paper is waterproof
why is water a polar molecule? because it has a negative charge at one end (oxygen end) and a positive charge at the other (hydrogen end)
why does water have polar covalent bonds? because electrons spend more time near the oxygen atom than the hydrogen atom
what is a hydrogen bond? weak bonds water can form with itself
why will some substances dissolve in water and others not? substances will only dissolve in water if they have a charge (can be positive or negative)
what is the molecular makeup of water? water is a polar covalent bond that is slightly negatively charged on the oxygen end and is slightly positively charged on the hydrogen end.
describe the ionic bond between sodium and chlorine sodium gives an electron to chlorine making them both stable.
ion charged atom
Created by: edenbreslauer