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BJU Science 6 - Ch. 7 Flashcards | StudBud
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BJU Science 6 - Ch. 7
BJU Science 6 - Ch. 7
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1
The scientist ___ developed the periodic table of elements.
Dmitri Mendeleev
Niels Bohr
Ernest Rutherford
Robert Boyle
2
chemical symbols and numbers abbreviating the name of a compound
chemical change
chemical formula
atom
atomic number
3
The compound H
2
CO
3
has ___ atom(s) of carbon in it.
3
2
0
1
4
based on the number of protons in the nucleus
chemical change
atomic number
chemistry
ion
5
Scientist ___ developed a simplified model of an atom.
Dmitri Mendeleev
Niels Bohr
Robert Boyle
Ernest Rutherford
6
an atom that has gained or lost electrons
atom
element
salt
ion
7
A substance that changes color when exposed to acid or base solutions is called a(n) ___.
salt
molecule
indicator
ion
8
The sum of the number of protons nad neutrons results in an atom's approximate ___.
atomic mass
electrons
atomic number
pH scale
9
Are these acids or bases? Lemons, vinegar, tomato juice
Base
Acid
10
the process in which different types of atoms join and form a new substance
salt
ion
element
chemical change
11
I need to be able to label all four of these in a diagram.
neutron
proton
nucleus
electron
12
In a(n) ___ atoms share electrons.
element
covalent bond
salt
ionic bond
13
Does this describe acids or bases? Bitter taste
Base
Acid
14
When positively and negatively charged ions attract each other they form a(n) ___.
neutron
ionic bond
covalent bond
indicator
15
You can determine the concentration of acids or bases in a solution by using ___.
a particle accelerator
the periodic table of elements
the pH scale
a salt
16
Are these acids or bases? baking soda, soap, bleach
Acid
Base
17
the study of matter - what it is made of, what its usual characteristics are, how it reacts to other matter
salt
chemistry
chemical formula
atomic number
18
Does this describe acids or bases? Can burn, be corrosive
Acid
Base
19
The element copper has 29 protons, how many electrons does it have? How do you know?
28, because there's always one less electron
1, every element has just one electron
29, because protons equal electrons in an atom
30, because there's always one more electron
20
The fourth arrow (pointing at 22.98977) tells us what?
chemical symbol
element name
atomic mass
atomic number
21
Does this describe acids or bases? Sour taste
Acid
Base
22
an ionic compound produced from a reaction between an acid and a base
ion
salt
chemistry
atom
23
A ___ reaction occurs when a compound is broken down into simpler compounds.
decomposition
replacement
combustion
synthesis
24
Does this describe acids or bases? Slippery to touch
Acid
Base
25
a subtance, only one kind of atom
ion
salt
chemical formula
element
26
What are at least two things you can tell us about an element based on its location in the periodic table?
Periods tell how many shells of electrons the element has.
Nothing - the elements are placed randomly on the table.
Elements in the same group have similar physical and chemical properties.
Groups tell how many electrons are in the element's outer shell.
27
Your little brother was just bitten by a fire ant. You know the bit is painful because of the acid it contains. So...
You can find a base in your home to neutralize the acid, like baking soda.
You can find an acid in your home to neutralize the acid, like vinegar.
28
The third arrow (pointing at 'Na') tells us what?
atomic number
element name
atomic mass
chemical symbol
29
The first arrow (pointing at 11) tells us what?
atomic mass
atomic number
chemical symbol
element name
30
Explain why all compounds are molecules but not all molecules are compounds. (Select all that are true.)
This is not true. All molecules are compounds.
Some molecules are produced when atoms of the same element combine.
Some molecules are produced when atoms of the same element combine.
Compounds are a kind of molecule produced as a result of chemical change.
31
The second arrow (pointing at 'Sodium') tells us what?
atomic mass
element name
chemical symbol
atomic number
