stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
periodic table and forming new substances Flashcards | StudBud
Explore
/
periodic table and forming new substances
periodic table and forming new substances
42 terms
·
StudBud Administration
·
150 plays
Imported from external platform
Flashcards
42 cards
F
Practice quiz
P
Host live
L
Questions
42
Answers
1
What element helps light bulbs last longer?
xenon
neon
argon
krypton
2
What does the periodic law say about the properties of elements?
They change with atomic number.
They change when the isotope changes.
They change with atomic mass.
They change with mass number.
3
How can you be sure a chemical reaction is happening?
a new solid is formed
water turns to steam
a mixture is made
a solid dissolves
4
Which of the following is a sign of a chemical reaction?
steam from a teapot
water freezing on a pond
ice melting on the ground
thermal energy from a fire
5
Elements such as _____________ are named after scientists.
californium
mendelevium
chemical symbol
6
More than half of the _____________ are gases at roomtemperature.
nonmetal
semiconductors
metals
metalloids
7
What word best describes the lathanides?
reactive
unstable
dull
radioactive
8
What is NOT included in each square of the periodic table in your text?
atomic mass
atomic number
chemical symbol
melting point
9
Look at the chart. What is the symbol for potassium?
Li
Cs
Fr
K
10
What word best describes the actinides?
reactive
shiny
radioactive
stable
11
Which of the following describes chlorophyll breaking down into newsubstances?
chemical mixture
chemical substance
chemical reaction
chemical solution
12
Which word or words describe hydrogen?
unreactive
high density
colorless gas
very rare
13
What does periodic mean?
happening at regular intervals
happening once or twice
happening twice
happening almost never
14
The force that holds two atoms together is called a________
substances
diatomic
chemical bond
molecules
15
How do you read periods?
from bottom to top
from right to left
from top to bottom
from left to right
16
When _______ bump into one another with enoughenergy, chemical bonds break.
diatomic
chemical bond
molecules
substances
17
Which elements usually have the same properties?
those with the same color
those in a period
those in a horizontal row
those in a group
18
How are the alkali metals similar?
They are very reactive
They have few uses.
They are so hard they cannot be cut.
They are often stored in water.
19
Which element is not an alkaline-earth metal?
magnesium
barium
calcium
sodium
20
When chemical bonds break, the atoms rearrange to formnew____
substances
molecules
diatomic
chemical bond
21
What is another name for group?
family
electron
period
element
22
Groups are read from top to bottom. What elements are in Group 3?
La, Hf, Ta, W
Sc, Y, La, Ac
V, Nb, Ta, Db
Sc, Ti, V, Mn
23
Most of the elements in the periodic table are___
semiconductors
metalloids
metals
nonmetal
24
Elements such as ______________________ are named after places
virginiaium
californium
Floridaium
25
Where is hydrogen located on the periodic table?
in Group 18
above Group 1
below Group 1
in Group 1
26
What do atoms of elements in a group have that makes their propertiessimilar?
the same total number of electrons
the same number of outer level electrons
the same atomic mass
the same number of protons
27
How would you describe most transition metals?
low density and melting points
good conductor of thermal energy
poor conductor of electric current
dull
28
Metalloids are also called ________________.
nonmetal
metals
metalloids
semiconductors
29
How many nonmetals are in Group 18?
6
4
8
three
30
A solid that is formed in a solution is called a ______
precipitate
chemical reaction
31
At the atomic level, what makes elements reactive?
exchanging or sharing electrons
having the same number of protons
having the same number of electrons
having a filled outer level
32
How do the physical and chemical properties of the elements change?
across each period
within a family
across each group
within a group
33
When a substance changes to make a new substance, a_______ occur
chemical reaction
precipitate
34
What color indicates an element is a solid?
blue
green
red
yellow
35
What is each horizontal row called?
family
group
property
period
36
. For most elements the______________________ has one or, two letters
mendelevium
chemical reaction
chemical symbol
chemical solution
37
What element does the symbol Kr represent?
helium
neon
krypton
argon
38
What is true of the new materials formed in a chemical reaction?
No substances have original properties.
All substances have original properties.
Properties are the same as original materials.
Properties differ from original materials.
39
The atoms of ____ have about half of a complete set ofelectrons in their outer energy level.
metalloids
semiconductors
metals
nonmetal
40
The most common element in the Boron Group is__________ which is used to make airplane parts.
reactive
aluminum
boron
oxygen
41
What is the symbol for hydrogen?
Hi
h
H
Hid
42
A molecule made up of two atoms is _____________
diatomic
molecules
