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Chemical Reactions S1 Flashcards | StudBud
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Chemical Reactions S1
Chemical Reactions S1
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Introduction to Chemistry periodic table elements atoms
Flashcards
57 cards
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Practice quiz
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Host live
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Questions
57
Answers
1
I am salt. How many elements are present?
1
4
0
2
2
I am usually a hard, shiny solid that conducts heat and electricity?
Metal
Non Metal
Confused
Metalloid
3
Signs of chemical reaction
Fire/explosion
change in color
All of these
New odor
4
What are four signs of a chemical reaction?
Earth, water, wind and fire
Color change, gas, fire/smoke, precipitate
Melting, solidifying, evaporating
Melting, color change, gas, and explosions
5
What is a column of elements on the periodic table called?
Group
Table
Period
Row
6
What occurs during
ALL
chemical reactions?
energy new is destroyed
something new is made
energy is made
energy is destroyed
7
Increasing the concentration of reactants can speed up a chemical reaction.
True
False
8
What is the density of water?
1.2 g/cm3
0.5 g/cm3
2 g/cm3
1 g cm3
9
Which scientist is credited with creating the periodic table?
Del Amitri
Taylor Mendeleev
Dimitri Mendeleev
Gregor Mendel
10
Physical properties of noble gases are….
colourless and odourless
Low reactivity
Translucent and light
Highly reactive
11
Is sand an element, compound or mixture?
element
compound
mixture
12
I am one type of atom even if there are 1000 of me present.
Compound
Element
Lusterous
Density
13
Which density will float on water?
1.01 g/cm3
4 g/cm3
.37 g/cm3
10 g/cm3
14
Sodium and Chlorine form what?
Magnesium Chloride
Copper Bromide
Sodium Iodide
Sodium Chloride
15
What is melting point
Something getting to a point where it melts
Something getting to a point where it freezes
Something getting to a point where it heats up
Something getting to a point where it gets cold
16
What atomic number is helium?
7
9
2
5
17
What is the difference between a mixture and a compound?
A compound is chemically joined together.
A mixture is chemically joined together.
18
What does a catalyst do?
Speeds up a reaction
Slows down a reaction
Is a list of fun cat names
Interrupts a reaction
19
Why are fireworks examples of chemical reactions?
They change color and require energy.
They are made of chemicals.
20
Increasing temperature increases the speed of a chemical reaction.
True
False
21
What products are formed when we electrolyse copper chloride solution?
gold and chlorine gas
copper and hydrogen gas
copper and oxygen gas
copper and chlorine gas
22
Increasing the temperature of reactants will speed up a chemical reaction
True
False
23
What is a chemical reaction?
A change to something to produce a new chemical.
The smallest type of matter in the world.
Everything that reacts to chemicals.
A reaction between an acid and a base.
24
Which element has atomic number 8?
octium
carbon
oxygen
nitrogen
25
Water has a density of 1 g/cm3. Which substance will float in float?
Honey 1.42 g/cm3
Milk 1.026 g/cm3
Salt 2.17 g/cm3
Isopropyl Alcohol 0.786 g/cm3
26
When two or more different types of atoms are present, I am called
periodic table
Compound
Element
Density
27
Is gold an element, compound or mixture?
mixture
element
compound
28
Chemical reactions change substances into diff. ones by breaking and forming chemical bonds.
False
True
29
I am usually an element that is a gas or a brittle solid?
Metal
Still Confused
Metalloid
NonMetal
30
What do we call the substance we start with in a chemical reaction?
the product
the enzymes
the end
the substrate
31
What is the atomic number of gold?
47
80
79
82
32
Increasing the amount of substrate would speed up the chemical reaction.
True
False
33
How many elements are present?
3
24
0
12
34
is melting a
Chemical Property
Physical Property
35
Element, Compound or Mixture?
Mixture
Element
Compound
36
What is density?
weight
mass divided by volume
volume
mass
37
What do we call the substance that is made from a chemical reaction?
the enzymes
the end
the product
the substrate
38
What is a row called on the periodic table?
Family
Period
Column
Group
39
What colour does universal indicator solution turn in the presence of the alkali metals?
Yellow
Orange
Blue
Purple
40
Which is the most reactive Alkali metal
Rubidium
Cesium
Francium
Lithium
41
Neutralisation reactions produce:
Salt + Vinegar
Salt + Hydrogen
Salt + Water
Salt + Carbon Dioxide + Water
42
Physical change or chemical reaction?
Chemical Reaction
Physical Change
43
What is density?
the relatiosnship between weight and mass
it makes it float
the relationship between mass and volume
the relationship between mass and density
44
Element, Mixture, or Compound?
Compound
Mixture
Element
45
Element, Mixture, or Compound?
Compound
Element
Mixture
46
What is the name of the elements in group 8?
fire earth water wind
transition metals
noble gases
alkali metals
47
Which of the following statements about transition metals is true?
They are so soft they can be cut with a knife
They are never found uncombined in nature
They are the most reactive of all types of metals
They include metals such as gold, silver and copper
48
electrolysis of copper chloride produces
copper at one electrode
copper at both electrodes
copper in the solution
oxygen gas
49
What neutralises an acid
an alkali
an antacid
an acid
universal indicator
50
As you move down group 1 alkali metals the reactivity...?
Decreases
Increases
Stays the same
51
Is lemonade an element, compound or mixture?
mixture
element
compound
52
What elements are present in the pictured formula?
Carbon and Sodium
Sodium Chlorine & Idonine
Nitrogen and Chlorine
Sodium and Chlorine
53
Physical change or chemical reaction?
Chemical Reaction
Physical Change
54
I am organized into groups and periods with metals on the left and nonmetals on the right...
Periodic table
Confused
Valence Electron
Density
55
Why did the scientist Mendeleev leave gaps in his periodic table?
He left gaps for elements that had not yet been discovered
He was a fool
He left them for his mate to fill in
He forgot those bits
56
Which will float? density of water is 1.0 g/mL
both
neither
coke
diet coke
57
I am water. How many elements are present?
2
0
1
3
