REVIEWER FOR MIDTERMS

Question 1

is anything that occupies space and has mass.

Answer 1

Matter

Question 2

two divisions:

Answer 2

Mixture Substance & Pure Substance

Question 3

are solutions with a uniform composition where all the matter is in the same state. In other words, homogenous solution shave one clear solution that you
can see

Answer 3

Homogenous solutions

Question 3

MIXTURE SUBSTANCE:

Answer 3

HOMOGENOUS
HETEROGENOUS (SUSPENSION & COLLOID)

Question 4

are solutions with non-uniform compositions
consisting of different elements in different states. In other words, heterogeneous solutions have
visibly different parts that makeup the solution

Answer 4

Heterogeneous solutions

Question 5

is similar to a colloid except that the dispersed particles tend to be larger and will
eventually settle or form sediment

Answer 5

suspension

Question 5

is a substance in which microscopic particles are dispersed in a medium, but are not
dissolved in it

Answer 5

colloid

Question 6

PURE SUBTANCE

Answer 6

COMPOUND (MOLECULE)
ELEMENT (ATOM)

Question 7

is the smallest part of a matter that has all the characteristics of a chemical
element. An atom consists of sub-atomic particles called protons, neutrons, and electrons

Answer 7

atom

Question 8

is a substance that contains two or more atoms, from the same element, which
are chemically joined.

For example, hydrogen molecule(H2)

Answer 8

molecule

Question 9

is a substance made up entirely of one type of atom. They are considered tobe
pure substance.

For example, Gold (AU)

Answer 9

element

Question 10

is a substance that is made up of two or more different elements that are
chemically joined.

For example, water (H2O)

Answer 10

COMPOUND

Question 11

is anything that occupies space and has mass. It is the material substance of which physical
objects are composed. All matter is composed of fundamental building blocks called atoms, which
are arranged in various complex ways.

Answer 11

MATTER

Question 12

According to them, all matter could be
described as combinations of these four-basic substance: earth, water, air, and fire in various proportions, modified by four basic essences: wet, dry, hot and cold.

Answer 12

GREEK DEMOCRITUS (100 YEARS BC)

Question 13

In 1808, _______ an English school teacher.
an element was composed of
identical atoms that react the same way
chemically. The Physical combination of
one type
of atoms with another was visualized as being an
eye-and-hook affair. The size and number of the eyes and hooks were different for each element.

Answer 13

John Dalton (SEPTEMBER 06, 1766 - JULY 27, 1844)

Question 14

a Russian scholar, ______
showed that if the elements were arranged in order of increasing atomic mass, a periodic repetition of similar chemical
properties occurred. At that time, about65 elements had been identified. Mendeleev’s work resulted in the first periodic table
of the elements. Although there were many holes in the Mendeleev’s table, it showed that all the then-known elements
could be placed in one of eight groups

Answer 14

Dmitri Mendeleev (FEBRUARY 08, 1834 - FEBRUARY 02, 1907)

Question 15

Before the turn of the 20th century, atoms
were considered indivisible. The only difference
between the atom of one element and the atoms
of another was their mass. Though the efforts
of many scientists, its lowly became apparent
that there was an electrical nature of the
structure of an atom

Answer 15

JOSEPH JOHN THOMSON
(DECEMBER 18, 1856 - AUGUST 30, 1940)