A basketball has more mass than a golf ball because:

the basketball contains more matter.

the basketball takes up more space.

the golf ball contains a different kind of matter.

the golf ball has an indefinite composition.

A gas is a form of matter that

takes the shape and volume of its container.

is generally a liquid or solid at room temperature.

have a composition that is fixed.

is a ratio of equivalent measurements.

Which of the following is not a part of Dalton’s atomic theory?

All elements are composed of atoms.

Atoms of the same element are alike.

Atoms that combine do so in simple whole-number ratios.

The nucleus of an atom is

positively charged and has a high density.

negatively charged and has a low density.

negatively charged and has a high density.

positively charged and has a low density.

Dalton theorized that atoms are indivisible and that all atoms of an element are identical. Scientists now know that

atoms of an element can have different numbers of protons.

Dalton’s theories are completely correct.

all atoms of an element are not identical but they all have the same mass.

The number of neutrons in the nucleus of an atom can be calculated by

subtracting the number of protons from the mass number.

adding together the numbers of electrons and protons.

subtracting the number of protons from the number of electrons.

adding the mass number to the number of protons.

Which of these statements is false?

Electrons have a mass of 1 amu.

Electrons have a negative charge.

The nucleus of an atom is positively charged.

The neutron is found in the nucleus of an atom.

An atom of an element with atomic number 48 and mass number 120 contains

48 protons, 48 electrons, and 72 neutrons.

72 protons, 48 electrons, and 48 neutrons.

120 protons, 48 electrons, and 72 neutrons.

72 protons, 72 electrons, and 48 neutrons.

How do the isotopes hydrogen-2 and hydrogen-3 differ?

Hydrogen-3 has one more electron than hydrogen-2.

The number 80 in the name bromine-80 represents

the sum of protons and electrons.

The formula 2n² represents

the maximum number of electrons that can occupy an energy level.

the number of sublevels in any energy level.

the number of orbitals in a sublevel.

Stable electron configurations are likely to contain

fewer electrons than unstable configurations.

According to Hund’s rule, when electrons occupy orbitals of equal energy, one electron enters each orbit until

all the orbitals contain one electron, with spins parallel.

all the orbitals contain one electron, with opposite spins.

there are two electrons in each orbital.

General Chemistry Midterm Review

Authored by Rochelle Nichols

Science

10th Grade

NGSS covered

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the activity that belongs in the field of chemistry.

developing medicines

analysis of a compound

production of a new plastic

all of the above

Which of these chemicals is definitely inorganic?

one that is made of carbon and hydrogen

one that is made of nitrogen and carbon

one that is made of nitrogen and hydrogen

one that is made of carbon and oxygen

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is not a step for solving a numeric word problem?

calculate

conclude

analyze

evaluate

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the false statement.

Chemistry plays an important role in efforts to increase the world's food supply and to protect crops.

Biodiesel is a fossil fuel.

Potato plants with a jellyfish gene will glow when they need to be watered.

Chemists are working to develop more pest-resistant and disease-resistant plants.

A hypothesis is

an observation recorded from an experiment.

a proposed explanation for what is observed.

a summary of the results of many experiments.

a well-tested explanation for many observations.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is not a part of the scientific method?

experimenting

Observing

proving

hypothesizing

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the false statement.

A scientific law fully explains a set of observations.

The scientific method is a logical, systematic approach to the solution of a problem.

For the results of an experiment to be accepted, the experiment must produce the same results no matter how many times it is repeated.

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General Chemistry Midterm Review

Identify the activity that belongs in the field of chemistry.

Which of these chemicals is definitely inorganic?

Which of the following is not a step for solving a numeric word problem?

Identify the false statement.

A hypothesis is

Which of the following is not a part of the scientific method?

Identify the false statement.

Which of these steps of the scientific method involves stating a relationship but not proposing an explanation for the relationship?

All of the following are general characteristics of a substance in the liquid state except

In the chemical reaction: iron plus oxygen yields iron oxide,

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