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WorksheetsPart I: Multiple Choice - Basic Chemistry & Atomic Structure
Total questions: 82
Worksheet time: 41mins
Which science studies what things are made of and how they change?
Astronomy studies stars and comets
History studies people and events
Chemistry studies matter and its changes
Geography studies maps and places
Which pair are tiny parts inside an atom’s nucleus?
Protons and neutrons
Electrons and photons
Neutrons and light
Protons and sound
Where do electrons move in an atom?
Around the nucleus
Inside a molecule
Outside the element
Inside the nucleus
Which has almost no mass compared to the others?
Nucleus has very small mass
Neutron has very small mass
Proton has very small mass
Electron has very small mass
What electric charge does a proton have?
No electric charge
Negative one charge
Two positive charge
Positive one charge
What electric charge does an electron have?
No electric charge
Positive one charge
Negative one charge
Two negative charge
What electric charge does a neutron have?
Positive one charge
Two positive charge
Negative one charge
No electric charge
Which list shows the three main subatomic particles?
Neutron, molecule, ion
Electron, cell, proton
Proton, atom, element
Proton, neutron, electron
If a copper atom has 29 protons, how many protons does Cu2+ have?
Still twenty-five protons
Now twenty-seven protons
Still twenty-nine protons
Now thirty-one protons
A neutral chlorine atom has 17 protons. How many electrons does it have?
Seventeen electrons
Fifteen electrons
Sixteen electrons
Eighteen electrons
Which sentence about the periodic table period is correct?
Row with same electron shells
Column with same electron shells
Column with same nucleus mass
Row with same nucleus mass
Which sentence about a group in the periodic table is correct?
Column with similar properties
Square with random elements
Box with mixed properties
Row with different properties
Which statement about an atom’s nucleus size is best?
Nucleus is tiny compared to atom
Nucleus is larger than atom
Nucleus equals atom in size
Nucleus fills almost whole atom
Which information does an element symbol tell you?
Short name of the element
Exact mass of the nucleus
How heavy the atom feels
Number of neutrons only
Which topic is NOT studied in chemistry?
Speed of light in space
Changes of different materials
Parts that make up substances
How matter can react
Mendeleev first arranged elements in a table by increasing what?
alphabetical element names
atomic number increasing order
atomic mass increasing order
random discovery dates
Isotopes of the same element always have the same number of what particles?
electrons in shells
energy levels all equal
neutrons in atoms
protons in the nucleus
Atomic mass mostly comes from the total of which two particles?
electrons only count
neutrons and electrons
protons and electrons
protons and neutrons
An oxide that reacts with water to make a base is called what type of oxide?
colorful metal oxide
basic oxide in water
acidic oxide in water
neutral gas oxide
Which gas oxide helps make sulfuric acid when dissolved in water?
NO2 dissolving well
SO3 dissolving well
CO2 dissolving well
N2 dissolving well
How many electrons make a full outer shell for many atoms in bonding (octet rule)?
six outer electrons
two outer electrons
ten outer electrons
eight outer electrons
A chemical bond helps atoms do what together?
turn into magnets
change into light
float apart gently
stay together strongly
Which atom number tends to lose 2 electrons to reach a stable octet?
magnesium Z equals 12
neon Z equals 10
fluorine Z equals 9
sodium Z equals 11
Electrons in the same sublevel of an atom have energy that is usually how?
always exactly zero
about the same value
much higher random
much lower random
In a multi-shell atom, which shell is farthest from the nucleus among K, L, M, N?
K shell farthest
M shell farthest
L shell farthest
N shell farthest
An ionic bond forms because of attraction between which charged particles?
two anions only
electrons and neutrons
cations and anions
two cations only
When an atom loses electrons, what does it become?
neutral atom again
tiny proton only
positive cation ion
negative anion ion
When an atom gains electrons, what does it become?
neutral gas atom
energy light beam
negative anion ion
positive cation ion
Sodium Na, magnesium Mg, and aluminum Al most likely form which ions?
Na+, Mg2+, Al3+
Na+, Mg+, Al+
Na2+, Mg2+, Al4+
Na3+, Mg2+, Al3+
Which equation shows chlorine gaining one electron to make chloride?
Cl plus e gives Cl−
Cl gives Cl+ plus e
Cl plus 2e gives Cl2−
Cl− plus e gives Cl
In a salt crystal like NaCl, each Na+ is surrounded by how many Cl− nearest neighbors?
eight nearest neighbors
four nearest neighbors
six nearest neighbors
two nearest neighbors
Ionic compounds are usually solids because the particles have what?
weak electric forces
free-moving molecules
no forces at all
strong electrostatic forces
Periodic law says element properties repeat in a pattern when arranged by increasing what?
nuclear charge number
alphabetical symbols
melting points only
random lab order
Within a group of metals, as positive nuclear charge increases down the group, the metallic character usually does what?
disappears quickly
stays exactly same
becomes nonmetal fast
gets stronger gradually
A basic oxide like Na2O reacts with water to form which product?
sodium hydroxide base
sodium carbonate salt
sodium oxide solid
sodium bicarbonate
Which bond happens when one atom gives an electron to another?
Ionic bond happens with electron giving
Covalent bond happens with electron giving
Hydrogen bond happens with electron giving
Metallic bond happens with electron giving
Which bond happens when atoms share electrons fairly evenly?
Metallic sharing is very even
Polar covalent sharing is even
Ionic sharing is very even
Nonpolar covalent sharing is even
If one atom pulls electrons much more, what is the bond called?
Metallic with gentle even pull
Ionic with very even pull
Nonpolar covalent with uneven pull
Polar covalent with uneven pull
Which pair is most likely ionic: a metal and a nonmetal, or two nonmetals?
Any pair makes ionic
Two metals make ionic
Two nonmetals make ionic
Metal with nonmetal makes ionic
Electronegativity means what?
How strongly an atom pulls electrons
How heavy an atom feels in hand
How bright an atom can glow
How fast an atom can spin
A water molecule is bent, so what does this shape cause?
It has a polar overall shape
It has a nonpolar flat shape
It has a cubic overall shape
It has a triangular perfect shape
When two same atoms share electrons, like H-H, what is the bond?
Nonpolar covalent bond sharing
Hydrogen bond between waters
Ionic bond electron giving
Polar covalent bond sharing
Which sentence is true about an electron shell?
It is a place where electrons can stay
It is the center of the atom only
It is a tiny cloud of protons only
It is a space only for neutrons
What do subshells do inside a shell?
They make shells disappear quickly
They push the nucleus far away
They group electrons into smaller parts
They change atoms into new elements
Which choice best shows energy levels from near to far?
Shell 2, then Shell 1, then Shell 3
Shell 3, then Shell 2, then Shell 1
Shell 1, then Shell 2, then Shell 3
Shell 1, then Shell 3, then Shell 2
Which sentence is false about electrons in an atom?
All shells hold the same number always
Electrons fill shells from low to high
Shells are also called energy levels
Subshells belong inside a shell
Which picture shows an s orbital shaped like a round ball?
A flat square
A dumbbell shape
A star shape
A round ball shape
How many main types shown are s and p orbitals?
Four types shown
Five types shown
Three types shown
Two types shown
Where are electrons most likely found in an s orbital?
Close to the center
In a thin ring
In a straight line
Only far away
A p orbital looks most like which shape?
A triangle point
A perfect square
A zigzag path
Two connected ovals
How many electrons can fit in one orbital box together?
Five electrons
Two electrons
Three electrons
Four electrons
What do we call one electron alone in an orbital?
A ring electron
A group electron
A lone electron
A circle electron
Do electrons move in fixed paths like tiny planets?
Only straight lines
Yes, tiny circles
Yes, tiny squares
No, they form a cloud
What word means the space where an electron is likely to be?
A crystal spot
A magnet zone
A metal place
An orbital space
In a hydrogen atom, where is the electron most likely found?
Outside the cloud
Only at one point
Only at the edge
Inside the cloud
Which set of letters shows shells like K, L, M, N?
K, L, M, N
Q, R, S, T
A, B, C, D
W, X, Y, Z
Which is true about outer electrons of an atom?
They help decide traits
They make the label
They set the color
They change the mass
How are elements arranged in each period (row) of the table?
By shape only
By color only
By random order
By rising number
Elements in the same column are called what?
A set
A team
A group
A block
What do elements in the same group often share?
Same weight
Same picture
Same size
Similar behavior
In the table, a row is called a what?
A period
A circle
A corner
A unit
If two atoms have the same number of outer electrons, they often...
Act alike
Glow blue
Look square
Weigh the same
Which best describes the s orbital?
Flat ring shape
Round cloud shape
Sharp cube shape
Tall thin shape
Which best describes the p orbital?
Tiny dot only
Long straight line
Big circle only
Two-lobed cloud
How many lobes does a p orbital picture have?
Two lobes
Four lobes
Three lobes
One lobe
Electrons pair in an orbital in groups of...
Two only
Any number
Three only
Four only
Which is an oxide?
Rust called iron oxide
Water from rain
Milk for cereal
Sugar for tea
What do many hydroxides have in their name?
The word hydroxide
The word crystal
The word oxide
The word salt
What does the octet rule say atoms like to have?
Twelve electrons outside
Eight electrons outside
Three electrons outside
One electron outside
Ionic bonds usually happen between which kinds of atoms?
Two nonmetals together
A metal and nonmetal
Two gases together
Two noble gases
Covalent bonds usually happen between which kinds of atoms?
Two nonmetals share
A metal and noble gas
Two metals only
A metal gives away
Which is a property of many metal oxides?
They melt fast
They glow blue
They are basic
They taste sweet
Which is a property of many nonmetal oxides?
They are acidic
They are salty
They are spicy
They are sugary
Why do atoms form chemical bonds?
To be more stable
To look prettier
To be brighter
To be heavier
Which statement is true about hydroxides?
Many dissolve in water
All smell like flowers
All glow in dark
None dissolve in water
Which is a periodic trend word you might hear?
Bigger shells size
Triangle atom shape
Electronegativity change
Rainbow color change
What do atoms sometimes do in ionic bonds?
Lose their nucleus
Share all electrons
Give and take electrons
Hide their electrons
What do atoms do in covalent bonds?
Share electrons pairs
Trade protons fast
Swap neutrons quick
Lose all electrons
Electrons move around the center of an atom. What are these paths called?
Metal pieces
Tiny roads
Light rings
Electron shells
An element with 1 electron in its outer shell is usually a metal. Which picture clue helps you remember this?
Metals like to give electrons
Metals only take electrons
Metals never touch electrons
Metals hide all electrons
If an atom’s first shell is full with 2 electrons, where do new electrons go next?
To the second shell
Back to the first
Out of the atom
Into the nucleus
Which atom is more like a metal?
An atom that gives electrons
An atom that shares equally
An atom that grabs electrons
An atom that stays neutral
