Activation energy is the ...

energy needed to start a reaction

the quantity of matter an object has

Anything that occupies space and has mass

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Chemistry Pretest

20 termsStudBud Administration107 plays

A check to see if students have the basics of #Chemistry learned in order to understand principles of #Biology

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Questions 20

Answers

1
Elements are ...
combined substances that have multiple parts
the simplest unit of life
pure substances that are the simplest matter
2
The solvent is the
the substance that isn't involved
the substance things are dissolved in
the substance that is dissolved
3
Which of the following accurately describes the charge of each particle?
Proton - positive
Neutron - negative
Proton - neutral
Electron - neutral
4
A chemical reaction that releases energy is an ...
exceptergonic reaction
exergonic reaction
endergonic reaction
epigonic reaction
5
Activation energy is the ...
energy needed to end a reaction
energy that the reaction gives off
energy needed to start a reaction
6
What is the neutral number on the pH scale?
7
8
5
9
7
An enzyme helps ...
Increase the activation energy
Decrease the activation energy
Doesn't affect the activation energy
Stabilizes the reaction
8
An atom with a positive or negative charge is called a(n) ...
isotope
nucleus
ion
covalent atom
9
Bases are made up of
nothing
H+ ions
H2O ions
HO- ions
10
An ionic bond occurs when atoms ...
destroy electrons
Share electrons
create electrons
give/ take electrons
11
In a reaction, the ___ are the starting materials, and the ___ are the ending materials.
reactants, products
anions, cations
cations, anions
products, reactants
12
Which of the following is not a particle in an atom?
positron
proton
neutron
electron
13
Acids are ...
Higher on the pH scale
In the middle of the pH scale
Not on the pH scale
Lower on the pH scale
14
The simplest part of an element that retains all of the properties of the element is an ...
electron
proton
atom
neutron
15
A covalent bond occurs when two atoms ...
create electrons
give/take electrons
share electrons
destroy electrons
16
Mass is ...
the amount of space matter takes up
the distance matter covers
the quantity of matter an object has
how long matter takes to occur
17
chemical substances that neutralize small amounts of acid or base are ...
concentrated
saturated
dilutes
buffers
18
What is matter?
Anything that occupies space
Anything that has energy
Anything that occupies space and has mass
Anything that has mass
19
A pure substance made of two or more elements is a ...
Ion
Atom
Compound
Element
20
The nucleus of an atom includes
protons and electrons
neutrons and electrons
electrons
protons and neutrons

Chemistry Pretest Flashcards | StudBud