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WorksheetsPart 2 Study Guide
Total questions: 34
Worksheet time: 17mins
What is the smallest unit of an element that retains the properties of that element?
Atom
Molecule
Compound
Electron
Which subatomic particle has a positive charge and is found in the nucleus of an atom?
Electron
Proton
Neutron
Quark
What is the main factor that determines the chemical properties of an element?
Number of neutrons
Mass number
Atomic mass
Number of valence electrons
Which element is located in Group 1, Period 2 of the Periodic Table?
Helium
Lithium
Sodium
Beryllium
Why do atoms form ions?
To increase their atomic number
To change their mass number
To become larger
To achieve a full outer shell of electrons
What is the primary force that holds the nucleus of an atom together?
Electromagnetic force
Strong nuclear force
Weak nuclear force
Gravitational force
What type of radiation is the emission of two protons and two neutrons from the nucleus?
Alpha radiation
Beta radiation
Gamma radiation
Neutron radiation
What is the result when a neutron in the nucleus decays into a proton and an electron?
Alpha decay
Beta decay
Gamma decay
Fusion
According to the graph, what is the half-life of uranium-238?
50 years
9 million years
4.5 billion years
13,500 billion years
After three half-lives, what percentage of uranium-238 isotopes have decayed?
50.0%
75.0%
87.5%
97.0%
Through carbon-14 dating, it was determined that about 9% of a fossil's original carbon-14 remained. Based on this percentage, which other claims about the fossil are supported by the information in the table?
The carbon-14 in the fossil had five half-lives.
The fossil was between 18,000 and 21,000 years old.
The amount of carbon-14 in the fossil decreased over time.
The fossil was older than other fossils found in the same area.
An author claims the age of 6,000-year-old seeds from an ancient culture was determined using uranium-238 radioactive dating. A scientist would most likely challenge this claim because uranium-238
can only be found in fossilized marine remains.
is man-made and processed in nuclear reactors.
has a half-life much greater than this timeframe.
is formed in supernovae and neutron star collisions.
Which process involves splitting of a heavy nucleus into lighter nuclei?
Fusion
Gamma decay
Fission
Radioactive decay
What is the most common isotope of hydrogen?
Deuterium
Tritium
Protium
Hydrogen-2
Which type of bond involves the sharing of electron pairs between atoms?
Covalent bond
Ionic bond
Metallic bond
Hydrogen bond
What is the term for a solid turning directly into a gas without passing through the liquid state?
Melting
Condensation
Freezing
Sublimation
Why is water considered a polar molecule?
It has equal sharing of electrons
It has an unequal distribution of charge
It has no net charge
It can dissolve nonpolar substances
Which concept explains why ice is less dense than liquid water?
Surface tension
Cohesion
Adhesion
Hydrogen bonding
Which type of chemical bond involves the transfer of electrons from one atom to another?
Ionic bond
Covalent bond
Metallic bond
Hydrogen bond
What happens to the atomic radius of an element as you move from left to right across a period in the periodic table?
It increases
It decreases
It remains the same
It fluctuates
What do you call a mixture that has the same composition throughout?
Heterogeneous mixture
Compound
Homogeneous mixture
Suspension
Which of the following elements is most likely to form a covalent bond?
Sodium (Na)
Magnesium (Mg)
Potassium (K)
Carbon (C)
Why do atoms share electrons in a covalent bond?
To become positively charged
To become negatively charged
To achieve a full outer electron shell
To lose excess electrons
What type of reaction is represented by the equation 2H₂ + O₂ → 2H₂O?
Synthesis
Decomposition
Single replacement
Double replacement
In a chemical reaction, what does the law of conservation of mass state?
Mass can be created but not destroyed
Mass can be destroyed but not created
Mass changes based on the reactants used
Mass is neither created nor destroyed
Why is a catalyst used in a chemical reaction?
To slow down the reaction
To speed up the reaction
To change the products of the reaction
To balance the chemical equation
What is the term for a chemical reaction that absorbs energy from its surroundings?
Exothermic
Isothermal
Endothermic
Equilibrium
What makes saturated hydrocarbons different from unsaturated hydrocarbons?
Saturated hydrocarbons are composed entirely of double bonds
Saturated hydrocarbons are composed entirely of single bonds
Saturated hydrocarbons are composed mostly of double bonds
Saturated hydrocarbons are composed mostly of single bonds
Why are hydrocarbons considered non-polar molecules?
They have a uniform distribution of charge.
They contain double bonds.
Their molecular geometry is complex.
They have lone pairs of electrons.
What is the part of the atom labeled 'a' in the diagram?
Electron
Neutron
Proton
Molecule
What is the part of the atom labeled 'c' in the diagram?
Electron
Neutron
Proton
Molecule
What is the part of the atom labeled 'b' in the diagram?
Electron
Neutron
Proton
Molecule
Balance the following equation by adding coefficients: MgCl₂ + HF → MgF₂ + HCl
1, 2, 1, 2
1, 1, 1, 1
2, 2, 2, 2
3, 3, 3, 3
Fill in the blanks for the equation of Aerobic Cellular Respiration: ___ + ___ → ___ + ___ + ATP
6 O₂, C₆H₁₂O₆, 6 CO₂, 6 H₂O
6 CO₂, 6 H₂O, 6 O₂, C₆H₁₂O₆
C₆H₁₂O₆, 6 CO₂, 6 H₂O, 6 O₂
6 H₂O, 6 CO₂, C₆H₁₂O₆, 6 O₂
