Science mid term chemistry 2019

Matter is not created or destroyed, but conserved

Substance doing the dissolving

A(n) ______ changes one factor and observes or measures what happens

An ionic compound is

What does this image mean in a chemical equation

5th step to solving a problem/ question

Antoine Lavoisier

Change in size shape or state of matter

A change from one substance to another

Heterogeneous mixture containing a liquid that visible particles settle

Chemical bond, has different physical + chemical properties from the elements the contain

OH- means

Organic compound that changes color in acids and bases

When dissociates into water almost 100%, dissociates into ions

What are the two groups required to have a valid experiment

Easier to ___ electrons than to _____ electrons

Ionic compounds and covalent molecules both…

The electrons that are on the outer shell of the electron

Electrolytes; more ions, more current it can conduct

___ is the universal solvent because…

Electron cloud structure

Sum of the number of protons and neutrons in the nucleus of an atom

What is the sixth step of the scientific method?

Name this image

What is the fifth step of the scientific method?

Location on periodic table, chemical properties, and structure of an atom are

Sour, corrosive, can damage/burn tissue

4th step to solving a problem/ question

Temperature, concentration, surface area, agitation, pressure

The ___ of an atom is/ are not affected by a chemical reaction

An example of physical properties are

Kilo, K

One substance breaking down into 2 or more substances

The negative part of water is attracted to the positive ion in the base

Reaction that takes place between a base in water

Mass number minus atomic number equals number of

Number of protons

Change, protons ≠ electrons

Homogeneous mixture of particles that can’t be seen with a microscope; will never settle

Any characteristic that can be observed without changing the identity of the substance

How many groups are there on the periodic table

The most solute that can be dissolved at a specific temperature

Who’s model of an atom is this

Meltdown to more molecules, mix together, harden

Mono is the prefix for

Water molecules are polar

More solute can be dissolved

Hexa is the prefix for

protons and neutrons are smaller than electrons

Octa is the prefix for

Neutral, protons=electrons

^^

Unevenly mixed

Di is the prefix for

2 pairs of shared elections between 2 atoms is called a _____ (4 total electrons)

One substance dissolved in another

Who’s model of an atom is this

The data may be ____ or ____

Giga, G

Located outside nucleus, negative charge,

Pair of shared electrons between two atoms is called a ______(total of 2 electrons)

Henry G.J. Mosley…

There should be __ variable(s) in a valid experiment

Heat, light, cooling, color change, bubbles, smoke, sound, smell transformation of substance

Chemical reaction requires more energy to break bonds than is required when new ones form

Light, sound, heat, electricity, releasing energy

What does this image mean in a chemical equation

Who’s model of an atom is this

Always gain electrons

In order to verify the results, experiments must be

What does this image mean in a chemical equation

Centi, c

Only atoms in outer layer, increasing____increases chance for collision

A ______ experiment will only have ONE variable

Deci, d

^^

Matter is is measured in atomic mass units (amu)

Gathered through senses.

Way to describe a chemical reaction using chemical formulas and symbols

The quality of something that can be shaped into something else without breaking it

^^

What is the second step of the scientific method?

____can be different for the same element

A solution in which water is the solvent

6th step to solving a problem/ question

Periodic table arrangement today

Elements in the same family have _____ chemical properties

Which side is describing which

Found in nucleus, no charge,

The factor that is measured or observed is the

A procedure to test the hypothesis.

Who’s model of an atom is this

Tetra is the prefix for

Always lose electrons

The main acid in your stomach

What does this image mean in a chemical equation

The……makes a special effort to keep other factors constant so that they will not effect outcome

Found I the nucleus, have a positive charge, “finger print” of an element

Gives molecules less room, more likely to bump into each other

Negative area of water is attracted to the positive H+ in the acid

Positively charged center of the atom

Light sensitivity

Evenly mixed

Explain this model

What does this image mean in a chemical equation

Hepta is the prefix for

^^

Heat, releasing heat

Increasing temp increases the rate, surface area, agitate

The degree to which a specified material conducts electric currents

2nd step to solving a problem/ question

A suggested solution to the problem.

The substance that reacts

Describes how much solute is in a solution compared to the amount of solvent

Burning, combination of a substance with O, produces energy, heat, light, O->CO2, describes…

When dissolves in water only a fraction of the acid molecules dissociate into ions

You can use _____ to separate-distillation

Usually percentage by volume

What is the fourth step if the scientific method?

International union of applied chemistry is responsible for

oxidation is The process or result of _____ or being ______

Atoms of the same element that have different numbers of neutrons

3rd step to solving a problem/ question

Heat, absorbing heat

A characteristic of a substance that indicates whether it can undergo a certain chemical change

The concentrations of calcium and magnesium ions expressed in terms of calcium carbonate

What does this image mean in a chemical equation

What is the third step of the scientific method?

Dimitri Mendeleev…

Nano, n

^^

Help maintain pH level

Positive ions

Go see my other Quiz! To finish

Solutions can be gaseous or solid

Energy cannot be created or destroyed it only changes form

Any of our metals and their bond with each other

The new substance that is produced

____ number is always the same

^^

Represents the number of units of each substance taking part in the reaction

The factor that is changed is known as the

Same number of atoms of each element in both sides of the equation

Atoms need to have ___ electrons in its outer shell to feel full

The ability of a substance to burn or ignite, cause fire or combustion

Light, heat, electricity, absorbing energy

Less energy is needed to break original bonds than is released when new bonds are formed

A compound that has 2 elements

The Control variables Are used for comparison.

The results of the experiment

Factors that are kept constant in order to not effect the outcome of the experiment

Smallest piece of matter that still retains the property of the element

The property of a solid, liquid, or gaseous chemical solute to dissolve in a solid

Matter composed of one type of atom

Micro, μ

Negative ions

Solid solution that is in most coins

Scattering of light by a colloid

2 or more types of substances combine to form new substances

Colloid comes from the Greek word

Meter/gram/liter

One element replaces another

Share electrons, molecules, ex H2O

What does this image mean in a chemical equation

Toxicity is the quality of being ____ or _______

Measure of H+ or H3O ions in a solution

Milli, m

Large amount of solute dissolved in solvent

What is the first step of the scientific method

A hypothesis must be....

Conditions that control chemical reaction rates

Periodic table shows

_____ particles are large enough to scatter light

series of dots surrounding an element’s symbol in order to show sharing/transfer of electrons

Sugar is not polar

Slows down a chemical reaction

Tri is the prefix for

The answer to the hypothesis based o the data collected from the experiment

If an atom loses an electron there is a ______ charge

Light can be seen as it passes through a colloid

3 pairs of shared electrons between 2 atoms is called a _______(6 total electrons)

Factor in the experiment that is being tested

Positive ion replaces positive of another compound

____ has most of the mass of atoms

One or more substances are converted to a new substance

Involves the linking together of molecules incorporating double or triple carbon-carbon bonds

Hecto, h

Speed up chemical reactions without being permanently changed

H3O means

If an atom gains an electron there is a _____ charge

Data can be organized into

^^

Smaller than protons and neutrons, makes up protons and neutrons, science has confirmed 6

Energy is given off in the form of heat. Product has less energy that the reactant

Data must be

Tells what elements make up a compound + the exact number of each element in 1 unit of compound

Atomic number increases ____________

Substance being dissolved

Contains more solute than the saturation point

Molecules are moving

Consisting of homogenous or heterogeneous

^^

Charge of the ion

In nuclear reactions, mass can be _______ into energy

The control variable is being tested

Mega, M

The mass of the different element’s different isotopes averaged

Deca, da

Elements of one kind of atom

Minimum amount of energy needed to start a reaction

What does this image mean in a chemical equation

Mendeleev’s predictions…

Molecules move more freely

What does this image mean in a chemical equation

Penta is the prefix for

Solid <—>liquid<—>gas

Chemical reaction of reacting monomer molecules forms polymer chains in a variety of complexity

^^

Mixture that the particles are larger than those in a solution but not heavy enough to settle

1st step to solving a problem/ question

Small amount of solute in the solvent

Allows reactants to mix

Groups/columns are sometimes called

Only the ___ electrons of atoms are involved with a chemical reaction

A gentle sheen or soft glow, especially that of a partly reflective surface