Worksheets25-26,Unit 1, Less.2 "Atoms and Elements"
Total questions: 29
Worksheet time: 15mins
Name
Class
Date
1.
PERIODIC TABLE:
Each row, is called a _______, (left to right) and the atomic number increases left to right, smallest to largest
a)
Period
b)
Group
2.
PERIODIC TABLE:
Each column, is called a ________, includes elements that have similar physical and chemical properties
a)
Period
b)
Group
3.
There are _____ elements on the Periodic Table of the Elements with ____ occurring naturally on Earth and ____ being synthesized or man-made.
a)
118 / 94 / 24
b)
128 / 104 / 24
4.
An ________ is the smallest unit of an element that has the chemical identity of that element.
a)
pure substance
b)
property
c)
atom
5.
Each element has a unique set of ____ and ____ properties.
4 lines
6.
What is the Atomic symbol of this element?
4 lines
7.
What is the Atomic number of this element?
4 lines
8.
What is the Atomic mass of this element?
4 lines
9.
Which statement BEST correctly describes ATOMS?
a)
Atoms come in different sizes, but most are visible using a simple hand lens.
b)
Atoms combine to make all the substances on Earth.
10.
A Number based on the structure of the atoms that make up the element and unique to every element
a)
Atomic Mass
b)
Atomic Number
11.
An arrangement of ALL known elements in order of atomic number is called the ______ ______.
4 lines
12.
Some elements have similar colors, densities, BUT NO TWO elements have exactly the same set of ______ and _______ properties
4 lines
13.
Symbol, name, atomic number, atomic mass, each ______ includes all of the above.
a)
molecule
b)
element
c)
compound
14.
________ is a measure of how much matter an object contains
a)
Atomic Mass
b)
Atomic Number
15.
________ is where the element is placed in the periodic table
a)
Atomic Mass
b)
Atomic Number
16.
Which of these is the smallest?
a)
cells
b)
atoms
c)
elements
17.
How do atoms of copper differ from atoms of aluminum?
a)
They are not pure substances.
b)
They have different chemical properties.
18.
Which substance cannot be separated or broken down into simpler substances by chemical means?
a)
table salt
b)
gold wire
c)
water vapor
19.
A ____ is a material that cannot be physically separated w/o chemically changing the substance
a)
pure substance
b)
property
c)
atom
20.
Think about a wooden chair and a balloon. What do these two objects always have in common?
a)
Both are made of atoms.
b)
Both have the same physical properties.
c)
Both are made of the same kind of atom.
21.
ONE type of atom Ex.>hydrogen [H], oxygen [O]
a)
compound
b)
element
22.
TWO or more atoms Ex.>water [H2O]
a)
molecule
b)
compound
23.
more than one type of molecule. Ex.> water - 2H2O
a)
compound
b)
element
24.
An atom is the _________ unit of that element.
a)
smallest
b)
largest
25.
An element is composed, ________, of one type of atom
a)
partially
b)
entirely
26.
_____________ are the building blocks of all other substances.
a)
Elements
b)
Atoms
27.
What do all elements in the same group of the periodic table have in common?
a)
They have the same atomic number.
b)
They have similar chemical properties.
c)
They are all gases.
28.
Which of the following is made up of only one kind of atom?
a)
Water
b)
Oxygen gas
c)
Salt
29.
What is the smallest unit that retains the properties of an element?
a)
Atom
b)
Molecule
c)
Compound
100 %
