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WorksheetsAll Things Atoms
Total questions: 15
Worksheet time: 15mins
The element Argon (Ar) has
18 protons
20 neutrons
39 electrons
58 neutrons
Ms. Williams' is looking around her house, classifying changes. She notices physical changes or chemical changes. Which of the following is a chemical change?
Ms. Williams' sister melts butter in the microwave
Ms. Williams' mother chops celery and onion into small pieces.
Ms. Williams mixes chocolate syrup into a glass of milk
Ms. Williams' daughter burns an English muffin,
An element has a shiny metallic appearance and is both ductile and malleable. In which group of the periodic table would the element most likely be found
Group 1
Group 4
Group 8
Group 7
Look at the following chemical equation:
SnO2 + H2 -------> Sn + H2O
It is balanced because the mass of the reactants is equal to the mass of the products.
It is unbalanced because the mass of the reactants is greater than the mass of the products.
It is unbalanced because the mass of the reactants is less than the mass of the products.
It is balanced because the number of reactants is equal to the number of products
A compound is a substance that--
has a charge because it has gained or lost electrons.
is made up of atoms of two or more elements.
is made up of many atoms of one type of element.
has the ability to react with any substance.
Boric acid has the following chemical formula:
H3 BO3
3 hydrogen atoms, 3 boron atoms, and 1 oxygen atom,
1 hydrogen atom, 1 boron atom, and 3 oxygen atoms.
3 hydrogen atoms, 1 boron atom, and 3 oxygen atoms.
1 hydrogen atom, 3 boron atoms, and 3 oxygen atoms
Which of the following is an element
HCl
Cu(SO4)3
MgBr
Li
The periodic table is divided into groups. In general,
elements that belong to the same group tend to have similar chemical properties.
the groups are based on the number of neutrons in the nucleus.
the groups are based only on atomic numbers.
elements in one group do not tend to bond with elements in other groups.
Reactivity is defined as the capacity of a unit of matter, such as an atom, to undergo a chemical reaction with another unit of matter. An atom's reactivity is determined by the number of--
electrons in its outer shell
protons in its outer shell
proton and neutrons in its nucleus
electrons and protons in its nucleus
A chemist placed a piece of pink paper in a beaker. He placed the beaker over an open gas flame produced by a Bunsen burner. As the paper was heated, it turned black and produced smoke. Later, the flakes of paper crumbled and became ash. Which of the following observations about the burning paper does NOT provide evidence of chemical reaction?
As the paper burned, its colored changed from pink to black
As the paper burned, it transformed into ash.
As the paper burned, it became warmer.
As the paper burned, it released black smoker
The atomic number is equal to the number of
protons
neutrons
valence electrons
protons plus electrons
How many Calcium atoms are in the chemical formula 4CaCO3?
12
1
4
14
Where are metals located on the Periodic Table?
left of the zig-zag
right of the zig-zag
along the zig-zag
across the periodic table
How many atoms of hydrogens are in CO(NH2)2
1
2
3
4
The amount of matter that an object contains is called
Density
Volume
Mass
Air
