Hon. Chemistry Unit 2 (MATTER) Test

Hydrogen

H

Helium

He

Lithium

Li

Beryllium

Be

Boron

B

Carbon

C

Nitrogen

N

Oxygen

O

Fluoride

F

Neon

Ne

Sodium

Na

Magnesium

Mg

Aluminum

Al

Silicon

Si

Phosphorus

P

Sulfur

S

Chlorine

Cl

Argon

Ar

Potassium

K

Calcium

Ca

Titanium

Ti

Chromium

Cr

Manganese

Mn

Iron

Fe

Cobalt

Co

Nickel

Ni

Copper

Cu

Zinc

Zn

Arsenic

As

Bromine

Br

Krypton

Kr

Rubidium

Rb

Strontium

Sr

Silver

Ag

Cadmium

Cd

Tin

Sn

Iodine

I

Xenon

Xe

Cesium

Cs

Barium

Ba

Tungsten

W

Platinum

Pt

Gold

Au

Mercury

Hg

Lead

Pb

Radon

Rn

______________ created the first atomic theory

John Dalton

Dalton’s atom was like a….

Marble

___________ discovered the electron.

JJ Thompson

JJ Thompson’s atom was ??

PLUM PUDDING

JJ Thompson used a….

Cathode Ray

The plum pudding model includes _______ embedded in a sphere of positive charge

Electrons

____________ discovered the nucleus

Ernest Rutherford

The nuclear atom model is from??

Ernest Rutherford

The nuclear atom was discovered with what experiment?

Rutherford’s Gold Foil experiment

1 in ________ particles bounced back in the gold foil experiment

8000

What is the charge of the nucleus?

Positive

Most of an atom’s mass is?

The nucleus

What charge are electrons?

Negative

Atoms are ______

Neutral

Who had the original idea that all matter was composed of atoms?

Democritus

________ though that atoms were “uncuttable”

Democritus

The diameter of an atom is ___________ times bigger than the nucleus

100,000

Electrons

1-

Protons

1+

Neutrons

Neutral!!

Isotopes are?

Atoms w/ the same number of protons but different number of neutrons

Ion

Charged atom

To find the proton number you…

Use the atomic number

If the isotope is neutral, to find the electron number you…

Used the proton number

If an ion, to find the electron number you…

Subtract: Proton - charge

To find the mass number you….

Add: proton + neutron (this is not the atomic mass)

To find the neutron number you…

Subtract: mass - proton

Atom

Basic unit of matter

There are _______ different types of atoms

118

An element is made of ____ atom(s)

One

The universe is about ______ Hydrogen (H)

90%

Living things are made mostly of…

OCHN

Allotrope

A different form of an element

Compound

Composed of at least 2 different atoms bonded together

Elements and Compounds are _________.

Pure substances

Mixture

2 of more substances physically mixed together

Mixtures are NOT….

Bonded

Homogeneous mixtures are…

Components that are uniformly distributed

Salt water is an example of a…

Homogeneous mix

Alloy

Mixture of a metal with 1 or more elements

Heterogeneous mixtures are…

Components not evenly distributed

Oil and water is an example of….

Heterogeneous mix

Distillation

Separation technique of a liquid mixture that depends on a difference in boiling points

Distillation is used for….

Homogeneous mixtures

Filtration

A separation technique that depends on the size of particles

Filtration is used for….

Heterogeneous mixture

Physical Property can be…

Observed without changing the chemical identity

Physical Change

Affects only physical properties

Water → Ice is an example of?

Physical Change

Chemical Properties are…

Observed when a substance reacts

Chemical Change/reaction

Process that produces 1 or more new substances

In a chemical change a _____ is produced

Gas

In chemical change a ______ could form

Precipitate

Precipitate

An insoluble solid produced when 2 CLEAR liquids react