Flashcards
Physics Atomic Test Notecards
Flashcards do conjunto (31)
- 1Building blocks of matterAtoms
- 2Material composed of only one kind of atomElement
- 3Every simple, complex, living, or nonliving substance in the known universe is put together from a pantry containing less than 100 elements True / FalseTrue
- 4Atoms are so small that there are about ___ atoms in a gram of water (a thimbleful)10 (23)
- 5Migration rate in: a) Solid b) Liquid c) Gasa) low
b) greater
c) greatest - 6How many years does it take for one exhaled breath to become evenly mixed in the atmosphere?6 years
- 7How long has atoms in our bodies been around?More than 4.6 billion years ago (long before the solar system existed)
- 8The perpetual jiggling of particles that are just large enough to be seenBrownian motion
- 9Brownian motion is evidence, as it results from the motion of neighboring __________ and ___________. They bump into the larger particles we can see.atoms and molecules.
- 10Smallest particle of a substance consisting of two or more atoms that bond together by sharing electronsMolecule
- 11All matter is made of molecules True / FalseFalse
- 12a substance that is made up of atoms of different elements combined in a fixed proportionCompound
- 13(tells the proportions of each kind of atom) description that uses numbers and symbols of elements to describe the proportions of elements in a compound or reactionChemical formule
- 14A compound may not be made of moleculesHalf true. It may be made of them.
- 15Why is Sodium Chloride (NaCl) a compound not made of molecules?It is made of different kinds of atoms that are arranged in a regular pattern.
Every (Cl) atom is surrounded by 6 (Na) atoms and vice versa. So no separate groups that can be labeled molecules - 16Compounds have properties different from those of the elements of which they are made True / FalseTrue... ex: Table salt is edible; chlorine is a poisonous gas | water is liquid; oxygen is gas
- 17Atomic nuclei are are extremely dense and compact True / FalseTrue
- 18Atoms with the same number of neutrons all belong to the same element True / FalseFalse
- 19Atoms of the same element having different numbers of neutrons are what of that element?Isotopes
- 20Lighter elements usually have less neutrons than protons, while bigger elements have more neutrons than protons. True / FalsePartly true. But lighter elements have an equal number of protons and neutrons.
- 21What is an atomic number?number of protons in the nucleus
- 22Mass and charge of a: a) Proton b) Neutron c) Electrona) 1, +
b) 1, 0 or no charge
c) 1/1836 or zero, - - 23an atom with a net charge (hint: when no. of electrons no longer = no. of protons)Ion
- 24covalent bondtwo atoms can be held together by the sharing of electrons
- 25ionic bondions are held together by simple electric forces
- 26The arrangement of electrons in the shells around the atomic nucleus dictates the atom's physical properties True / FalseFalse
- 27As you read across from left to right, each element ha one more proton and electron than the element beforeAs you go down, each element has one more shell filled to its capacity from the element above (more reactive as you go down)
- 28matter consists of positive ions and free electrons (great conductor of electricity)Plasma
- 29Solid phase of matteratoms and molecules vibrate about fixed positions
- 30Liquid phase of mattermolecules wander throughout the material in non-fixed positions; takes the shape of its container
- 31Gas state of mattermolecules move about and may break away from one another and become gas
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- Freshman High School School Work FlashCards sobre Physics Atomic Test Notecards, criado por Jem B em 08-02-2015.
- Criado por
- Jem B
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