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BJU Science 6 Ch 7 Test Flashcards | StudBud
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BJU Science 6 Ch 7 Test
BJU Science 6 Ch 7 Test
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1
If a substance changes color when it is exposed to an acid or a base solution, we call that substance
a molecule
an ion
an indicator
a salt
2
An ionic compound produced from a reaction between an acid and a base
chemical reaction
chemistry
ion
salt
3
Which is the nucleus?
5
2
4
1
4
The process in which different types of atoms join and form a new substance
chemistry
chemical formula
atomic number
chemical change
5
How are molecules formed?
when atoms of the same element combine
neither of those
both of those
when atoms of two or more different elements combine in a chemical reaction
6
Which is the neutrons?
1
5
2
4
7
an atom that has gained or lost electrons
atomic number
ion
atom
element
8
What is does a period on the periodic table tell us about the elements?
it tells how many shells of electrons the element has
it tells how many protons the element has
it tells how many electrons the element has
it tells how many shells of protons the element has
9
When a compound is broken down into simpler compounds it is called a
synthesis reaction
decomposition reaction
combustion reaction
replacement reaction
10
What is number 1?
element nature
chemical symbol
atomic number
atomic mass
11
What is number 2?
chemical symbol
atomic number
element nature
atomic mass
12
How do you determine the concentration of acids or bases in a solution?
testing the amount of salt
the periodic table of elements
using the pH scale
a particle accelerator
13
What is number 3?
chemical symbo
atomic mass
atomic number
element nature
14
Which is the protons?
4
2
1
5
15
The sum of the number of protons and neutrons results in the
electrons
pH scale
atomic mass
atomic number
16
Atoms share electrons in which of the following?
covalent bonds
salts
elements
ionic bonds
17
A substance that is only one kind of atom
element
atomic number
atom
ion
18
the smallest piece of an element that can be recognized as that element
ion
atom
atomic number
element
19
If an element has 26 protons, how many electrons does it have?
13 because it has half as many as it does protons
62 because it has the inverse number of protons
26 because it has the same number of protons
20
the study of matter--what it is made of, what its usual characteristics are, how it reacts to other matter
elements
atomic number
chemistry
chemical formula
21
What are the characteristics that belong to an acid?
lemons, vinegar, tomato juice
can burn; can be corrosive
all of the above
sour taste
22
based on the number of protons in the nucleus
element
chemical change
chemical number
ions
23
Which is the electrons?
1
5
2
4
24
What is number 4?
atomic mass
element nature
atomic number
chemical symbol
25
Positively and negatively charged ions attract each other and form what?
indicator
covalent bonds
neutrons
ionic bond
26
Who developed the periodic table of elements?
Robert Boyle
Ernest Rutherford
Dmitri Mendeleev
Niels Bohr
27
What do the groups tell us about the elements on the periodic table?
tell how many neutrons are in the outer shell
tell if they have an outer shell
tell how many electrons are in the outer shell
tell how many protons are in the outer shell
28
What is a compound?
a kind of molecule produced as a result of a chemical change
a kind of molecule produced as a result of a physical change
a kind of molecule produced when mixed with another molecule
29
chemical symbols and numbers abbreviating the name of a compound
atomic number
chemical change
chemistry
chemical formula
30
What are the characteristics of a base?
bitter taste
slippery to touch
baking soda, soap, bleach
all of the above
31
H2C4O has how many atoms of Oxygen in it?
2
1
6
4
32
If an mild acid was on your skin, and was causing an irritation, what could you use to neutralize the burn?
all of the above
the base of baking soda
the base milk
the base toothpaste
