Atoms & Elements And Stuff Flashcards

Question

Property- Conductivity

Answer 1

Ability of a substance to conduct electricity or heat energy. Called conductors Metals, copper, water.

Answer 2

Ability to resist being scratched. 1-10 Mineral talc - 1 Diamonds - 10

Answer 3

Feel of a substance Surface of a raw gemstone is rough but can be smoothed.

Answer 4

Can be pounded or rolled into sheets. Aluminum or tin.

Answer 5

A substance and its ability to change into a new substance with different properties.

Answer 6

When two substances get together, smth can happen. Ex. Iron + oxygen = rust Oxygen, water, and acid are very highly reactive.

Answer 7

How much a substance can damage an animal, plant, cell, or other organisms. Ex. Lead, chlorine gas, hydrofluoric acid, mercury.

Answer 8

Amount of energy released as heat when a substance is burned with oxygen (combustible). How easily smth will ignite (flammable).

Answer 9

Absorbs or emits heat Forms gas when heated Emits light during reaction Forms a precipitate (solid) during reaction/ gets thicker. Combustible Reacts with other substances like acid or water New colour appears **The change is irreversible**

Answer 10

Density anomaly Adhesion Cohesion Surface tension High specific heat capacity Capillary action Conductor

Answer 11

Water molecules are attracted to other things

Answer 12

Solid water is less dense than liquid.

Answer 13

Water molecules are attracted to itself (drops)

Answer 14

The attraction of water molecules creates a “film” which allows things to float.

Answer 15

Takes a long time to warm or cool Boiling point - 100 degrees Melting/freezing point - 0 degrees

Answer 16

Ability of water to move up - when plants soak water in at the roots it travels up the plant.

Answer 17

Not sure but have some evidende

Answer 18

Legos/ blocks to build things in the body Has a nucleus which contains protons and neutrons and is circled by electrons. Number of protons determines type of atom. Protons +, Electrons -, Neutrons o

Answer 19

Built from the atom “blocks” Put together to make things like H2O. When atoms are put together to make molecules, it forms a covalent bond.

Answer 20

Positively charged particles in nucleus Charge of +1 Number of protons determines the element

Answer 21

Neutral particles in nucleus Charge of 0 and mass of a proton

Answer 22

Negatively charged Orbit the nucleus in the electron cloud Charge of -1 Chemical properties of atom determined by its electrons Number of protons equals number of electrons

Answer 23

Atoms of the same elements can have different numbers of neutrons These are called isotopes The number of neutrons affects the mass number but not the atomic number

Answer 24

When atoms lose electrons, they become positively charged because there’s more protons than electrons When an atom gains electrons, it becomes negatively charged Negatively charged atoms are called anion or negative ions

Answer 25

Mass - atomic number

Answer 26

Alkali metals 1 electron in outer shell Easily lose the valence (outside) electrons React with water

Answer 27

Alkaline earth metals 2 electrons in outer shell Easily lose valence electrons Harder than alkali metals

Answer 28

Halogens 7 electrons in outer shell Toxic Top halogen is most reactive

Answer 29

Nobel gases More stable Less reactive Examples: neon signs, helium balloons, gas in between window panes, lasers, light bulbs, radioactive, propellant

Answer 30

Ionic and covalent

Answer 31

Metals and non metals NaCl, CuF2, LiN03 Electrons get stolen Opposite charges attract Metals are not greedy so they let their electrons get stolen

Answer 32

Non metal and non metal SO2, H20, C3H8O Held together because atoms are sharing electrons because they’re greedy and neither one will let them go.

Answer 33

<—> All elements in the same row have the same number of atomic orbitals Ex. Chlorine has three rings and in the 3rd row

Answer 34

^ All elements in the same group have the same number of electrons in their outer ring The number of electrons in the outer shell controls most chemical properties, meaning these chemicals all have similar properties

Answer 35

Hydrogen and helium Hydrogen can have talents and electrons of two groups, one and seven. Sometimes it’s missing an electron and sometimes it has an extra Helium can only have two electrons in its outer shell though it’s grouped with ones who have 8

Answer 36

88 elements Found in the left of the staircase Easily lose electrons Corrode/ rust

Answer 37

Found on right of staircase Tend to gain electrons

Answer 38

Zigzag line (stairs) Share properties of both metals and non metals

Answer 39

7 elements Hydrogen Nitrogen Oxygen Fluorine Chlorine Bromine Iodine Pure elements Form molecules containing two atoms When combined with other elements to make compounds, there are not necessarily two atoms.

Answer 40

every atom said to be indivisible said everything was the same didn't have proper technology to prove their theories

Answer 41

Indivisible atoms make up materials said to be a solid sphere Said the atom was the same throughout the whole thing

Answer 42

Discovered electrons made plum pudding model said the electrons/negative charge was stuck in the positive "dough"

Answer 43

Discovered the nucleus where the positive charge was held

Answer 44

Said electrons are spinning around outside of nucleus

Answer 45

1932-neutrons discovered electrons buzz around outside

Atoms & Elements And Stuff Flashcards

(70 cards)