Chemistry Flashcards

Question

Reactivity non the periodic table

Answer 1

Decreases going down with the exception of alkali metals increasing down Increases going across

Answer 2

Decreases going down and increases going left to right

Answer 3

Increases going down and decreases going left to right

Answer 4

lustrous, malleable, ductile, good conductors of heat and electricity

Answer 5

They aren't shiny (lustrous) and they don't conduct heat or electricity well

Answer 6

Metalloids are solids. Metalloids have low elasticity. They are brittle. They are semi-conductive (semi-conductors). They have average heat conductivity. They are ductile. They are malleable.

Answer 7

Melting point- decreases Boiling Point- decrease Reactivity- Increase Metallic Character- Increases Atomic Radius- Increases

Answer 8

Group 1 The alkali metals have the high thermal and electrical conductivity, lustre, ductility, and malleability that are characteristic of metals. Each alkali metal atom has a single electron in its outermost shell. This valence electron is much more weakly bound than those in inner shells.

Answer 9

Melting point- Increases Boiling Point- Increase Reactivity- decrease Metallic Character- Increases Atomic Radius- Increases

Answer 10

Group 7 They all form acids when combined with hydrogen. They are all fairly toxic. They readily combine with metals to form salts. They have seven valence electrons in their outer shell. They are highly reactive and electronegative.

Answer 11

Melting point- decreases Boiling Point- decrease Reactivity- Increase Metallic Character- Increases Atomic Radius- Increases

Answer 12

Group 2 The alkaline earth metals are the second most reactive family of elements. Beryllium, magnesium, calcium, strontium, barium and radium are all shiny, and silvery-white. They all have low densities, melting points and boiling points, and they tend to form solutions with a pH greater than 7.

Answer 13

Melting point- Increases Boiling Point- Increase Reactivity- Decrease Metallic Character- Increases Atomic Radius- Increases

Answer 14

Melting point- Increases Boiling Point- Increase Reactivity- Decreases Metallic Character- Increases Atomic Radius- Increases

Answer 15

Group 8 Noble gases are odorless, colorless, nonflammable, and monotonic gases that have low chemical reactivity. The full valence electron shells of these atoms make noble gases extremely stable and unlikely to form chemical bonds because they have little tendency to gain or lose electrons

Answer 16

generally decreases from left to right because of increasing nuclear charge increases moving up and down due to increasing number of electron shells

Answer 17

Two or more reactants combine to form one compound A + B → AB

Answer 18

A complex molecule breaks down to make a simpler one AB → A + B

Answer 19

Two solutions of soluble salts are mixed resulting in an insoluble solid (precipitate) Soluble salt A +Soluble Salt B → Precipitate + Soluble salt C

Answer 20

An acid and a base react with each other generally the product of this is salt and water Acid + Base → Salt +Water

Answer 21

Oxygen combines with a compound to form carbon dioxide and water. these reactions are exothermic meaning they give of thermal energy A + O2 → H2o + CO2 burning coal

Answer 22

One element takes place with another element in the compound A + BC → AC + B

Answer 23

React with most metals to form a salt and hydrogen gas Mg + HCl → Mgcl2 + H2

Answer 24

Most metals will combine with oxygen in the air to form metal oxides.

Answer 25

Respiration is the chemical reaction that goes on inside the cells of all living things.

Answer 26

Gives of energy to its surroundings by forming bonds Rusting, freezing and condensation

Answer 27

Takes in energy from surroundings by breaking bonds Photosynthesis, boiling, melting. Feels cold as thermal energy is taken in

Answer 28

amount of reactant used/product formed x time

Answer 29

temperature agitation surface area concentration catalysts

Answer 30

Higher temperature increases the speed of particle movement and this leads to more collisions between reacting particles. Higher temperature increases the energy of collision, meaning chemical bonds can be broken.

Answer 31

It lowers the activation energy of reactions

Answer 32

In order for a reaction to occur the particles must have enough energy and must collide at the correct angle ( proper orientation)

Answer 33

The increased surface means more area is in contact with the reactants around it, leading to more effective collisions between reactants and a higher reaction rate.

Answer 34

Increasing the concentration means more particles are able to collide and react, so the reaction rate increases.

Answer 35

Agitation keeps reacting particles in contact with each other by removing the products of the reaction and allowing more reactants to mix.

Answer 36

an element's ability to ionize (gain or lose electrons) or share electrons

Answer 37

Electronegativity is a measure of an atom's ability to attract shared electrons to itself. Increases left to right Decreases top to bottom

Answer 38

Thermal decomposition is a chemical reaction that happens when a compound breaks down when heated. Thermal decomposition reactions happen at high temperatures. The reactants absorb lots of energy as they break down into the products. Thermal decomposition reactions are examples of endothermic reactions, and are useful when cooking and baking cakes.

Answer 39

An oxidation–reduction or redox reaction is a reaction that involves the transfer of electrons between chemical species

Chemistry Flashcards

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