Matter, Compounds, Elements, Mixtures: Question Preview (ID: 32496)

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The following subatomic particles are inside the nucleus of the atom:
a) Electrons and protons
b) Neutrons and protons
c) Electrons and neutrons
d) Protons only

Water is an example of a(n)
a) atom
b) element
c) compound
d) mixture

The overall charge of an atom is neutral because _________.
a) The charge is dependent on the number of neutrons.
b) The charge is dependent on the number of electrons.
c) The charge is dependent on the number of protons.
d) The electrons and protons cancel each other out.

Examples of pure substances, or ___________ are oxygen, boron and silver.
a) atoms
b) elements
c) compounds
d) mixtures

Blood, trail mix, and salad are all examples of ______________.
a) atoms
b) elements
c) compounds
d) mixtures

Which of the following has a negative charge?
a) atoms
b) neutrons
c) protons
d) electrons

Which of the following has a positive charge?
a) atoms
b) neutrons
c) protons
d) electrons

Which of the following has no charge?
a) electrons only
b) protons only
c) neutrons only
d) neutrons and atoms

_____________ all have the same atoms.
a) elements
b) compounds
c) homogeneous mixtures
d) heterogeneous mixtures

Which of the following describes the relationship of atoms best?
a) Compounds and mixtures do not have any atoms.
b) Elements and compounds are similar to atoms.
c) Mixtures and elements are similar to atoms.
d) Everything in the Universe is made of atoms.

Which best describes a heterogeneous mixture?
a) It contains only one type of atom.
b) It is composed of two or more elements in a fixed pattern.
c) It contains two or more types of particles which are easily distinguished.
d) It is composed of two or more substances in which particles are evenly blended.

Which best represents a homogeneous mixture?
a) nitrogen gas and oxygen gas
b) sand and iron particles
c) soil from the garden
d) water and sand

Which could best be separated into simpler substances by filtration and evaporation?
a) atom
b) mixture
c) element
d) compound

Which is a homogeneous mixture?
a) pizza
b) vinegar
c) concrete
d) woven fabric

Which of these best describes a change that is physical?
a) yarn being knitted into a sweater
b) the engine from a tractor being started
c) the metal on a bicycle forming rust
d) grass capturing the energy from sunlight

Which is one characteristic of some pure substances?
a) They cannot be changed into simpler substances.
b) They can be homogeneous or heterogeneous.
c) They contain different types of molecules.
d) They can only be elements.

How many atoms of oxygen are in a molecule of glucose, C6H12O6?
a) 1
b) 6
c) 12
d) 24

Salt and water are stirred together in a beaker. The solid salt particles seem to disappear in the water. Which is the best explanation for the product that is formed?
a) A solvent has been created.
b) A solution has been created.
c) A compound has been created.
d) A new element has been created.

An element, X, contains 14 protons, 14 neutrons, and 14 electrons. What element is this?
a) Carbon
b) Silicon
c) Hydrogen
d) Calcium

Which is a substance that is held together by chemical bonds?
a) element
b) compound
c) mixture
d) solution

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