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WorksheetsALMA Science Final Sem. 1
Total questions: 17
Worksheet time: 9mins
Name
Class
Date
1.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
2.
In chemical reactions, the law of conservation of mass is......
a)
disobeyed
b)
not true
c)
obeyed
d)
used sometime
3.
What is a Chemical Bond?
a)
The force within Atoms
b)
When a line connects the atoms
c)
The force that holds atoms together
d)
When atoms are together
4.
What is a Chemical Reaction?
a)
When two liquids hit each other
b)
When a liquid has foam
c)
When two substances mix and have a reaction
d)
When a reaction forms with soda and candy
5.
What elements not are in the compound BeSeKr (4.1)
a)
Krypton
b)
Potassium
c)
Beryllium
d)
Selenium
6.
Which particle is represented by the atomic number? (4.2)
a)
Protons
b)
Neutrons
c)
Electrons
7.
An isotope is the same element with a different number of...? (4.3)
a)
Protons
b)
Neutrons
c)
Electrons
8.
Which of the 4 regions is the largest? (4.4)
a)
Transition Metals
b)
Alkaline/Earth Metals
c)
Nonmetals
d)
Noble Gases
9.
The following are properties of nonmetals except...? (4.5)
a)
Dull
b)
Brittle
c)
Semi-conductors
d)
gain or share electrons
10.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
11.
Who atomic model said electrons orbit the atom like planets orbit the sun
a)
Einstein
b)
Thomson
c)
Bohr
d)
Dalton
12.
Negatively charged particles that are found outside the nucleus.
a)
protons
b)
nucleus
c)
electrons
d)
neutrons
13.
A neutral subatomic particle found in the nucleus of an atom.
a)
neutron
b)
electron
c)
nucleus
d)
proton
14.
What scientist first developed 4 rules for atomic theory, and helped kick start modern chemistry?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
15.
Who is the first scientist to think that the atom was the smallest unit of matter?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
16.
What scientist is best known for his gold foil experiment?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
17.
What scientist is best known for his "Plum Pudding" model of the atom?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
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