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Periodic table and chemical/physical changes Flashcards | StudBud
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Periodic table and chemical/physical changes
Most Metals are
Density, solubility, and freezing points are element's
Periodic table and chemical/physical changes
26 terms
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7th grade science
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Answers
1
Density, solubility, and freezing points are element's
nonreactive properites
pure properties
physical properties
chemical properties
2
Most Metals are
liquid
solid
plasma
gas
3
Which group are alkali metals found in?
Group 2
Group 1
Group 17
Group 18
4
Which nonmetals are unreactive?
Oxygen group
Halogens
Noble gases
Transition metals
5
Reacting with an acid is an example of an element's
physical property
chemical property
melting point
pure property
6
Which element is necessary for substances to burn?
Oxygen
Nitrogen
Carbon
Hydrogen
7
What is periodic law
property changes periodically with the element atomic number
they are only liquids for a short period of time
mercury is a liquid at room temp
elements are either solids, liquids or gases
8
Mendeleev arranged elements by
increasing atomic number
Density
increasing number of protons
increasing atomic mass
9
Transition metals are
good conductors of thermal energy
used to make aluminum
more reactive than alkali metals
not good conductors of thermal energy
10
Why was Mendeleev's periodic table useful?
Had no empty spaces
Showed elements arranged by atomic number
showed atomic number
allowed for prediction of the properties of missing elements
11
A piece of ice melts and reacts with sodium is a
both
neither
chemical change
physical change
12
Vertical columns on the periodic table are called what?
Groups
Periods
Rows
Elements
13
Most of the elements in the periodic table are
gases
metals
metalloids
nonmetals
14
Which nonmetal forms fats, carbs, and proteins and essential for all living things on Earth?
Oxygen
Nitrogen
Hydrogen
Carbon
15
What type of property is flammability and reaction to light?
Pure
related to density
Physical
Chemical
16
What are the metals called in groups 3-12
Alkaline Earth
Actinides
Lanthanindes
Transition Metals
17
Which elements have radioactive atoms?
Actinides
noble gases
Lanthanides
Halogens
18
How are metalloids similar to metals?
somewhat malleable and ductile
good conductors of electricity and heat
Properties of nonmetals
Some shiny, while others are dull
19
Which of these nonmetals in most reactive?
Nitrogen
Neon
Oxygen
Fluorine
20
Elements to the right of the zig zag line are called what?
Metals
Metalloids
Nonmetals
Conductors
21
Horizontal rows on the periodic table are called
Family
Periods
Groups
Elements
22
Which metals are used to make steel?
Lanthanides
Alkali metals
Alkaline Earth metals
Actinides
23
Which family has 2 valence electrons?
Boron group
Alkaline earth metals
Alkali metals
Halogens
24
Combining hydrogen and oxygen to make water is a
physical change
chemical change
25
Iron rusting is a
chemical change
physical change
26
Alcohol evaporating is a
physical change
chemical change