Which pair of elements have similar properties and why?

Lithium and Sodium cuz' they're alkali metals

How did Mendeleev arrange atoms on his Periodic Table?

In order of increasing mass and repeated properties

Mendeleev used the arrangement of elements in his Periodic Table to

predict the mass & properties of undiscovered elements

Sodium (Na), Potassium (K), Beryllium (Be), Boron (B), Silicon (Si): Which two are most similar in properties & why?

Na and K cuz they are both alkali metals

are good conductors of heat and electricity.

Why is the Periodic Table shaped the way it is?

Because of how electrons are distributed in energy levels

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2.06 Periodic Table

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Arrangement of atoms on periodic table

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Questions 23

Answers

1
Most of the elements in the Periodic Table are
nonmetals
metals
gases
metalloids
2
Which pair of elements have similar properties and why?
Lithium and Sodium cuz' they're alkali metals
Hydrogen and Helium cuz' they're both gases
Oxygen and Chlorine cuz' they're both nonmetals
Tin and Xenon cuz' they're both in period 5
3
F (fluorine), Cl (chlorine), Br (bromine), and I (iodine) are all
halogens
alkali earth metals
alkali metals
noble gases
4
Which element has atomic number 6?
Carbon
Nitrogen
Oxygen
Boron
5
Elements that are ____ have similar properties
in the same family (column)
at opposite ends of a row
on either side of one another
in the same period (row)
6
The most reactive nonmetal is
oxygen
hydrogen
fluorine
Darth Vader
7
An element with atomic number 8 and atomic mass 16.999 has
8 protons and 8 electrons
9 protons and 8 neutrons
9 protons and 8 electrons
8 protons and 8 neutrons
8
Mendeleev's periodic table made sense to scientists at the time cuz' it used findings about element mass and properties.
True
False
9
This Lewis dot diagram could represent
Oxygen
Nitrogen
Carbon
Krypton
10
What is true of an element with atomic number 10 and atomic mass 19.995?
It's atomic mass is sum of masses of neutrons + electrons
It has 10 neutrons
It's atomic mass is sum of masses of protrons + electrons
It has a combined total of 10 protons and electrons
11
Metals
can be gasses at room temperature
are brittle and soft
have low density
are shiny and malleable
12
Which element has atomic mass 24.305?
Beryllium
Calcium
Magnesium
Sodium
13
Na is the symbol for
Potassium
Nitrogen
Sodium
Silver
14
How did Mendeleev arrange atoms on his Periodic Table?
In order of decreasing mass
In order of boiling point an melting point
by rate of reaction
In order of increasing mass and repeated properties
15
Which elements tend to be brittle, dull, and low in density?
Gases
Nonmetals
Metalloids
Metals
16
Mendeleev used the arrangement of elements in his Periodic Table to
predict the mass & properties of undiscovered elements
determine the isotopes of certain elements
discover the properties of nonmetals
determine electron configuration of elements
17
Sodium (Na), Potassium (K), Beryllium (Be), Boron (B), Silicon (Si): Which two are most similar in properties & why?
Be and B cuz they are in the same period
B and Si cuz they are both metalloids
Na and Be since they are in adjacent families
Na and K cuz they are both alkali metals
18
Alkali metals
bond with other metals
are in group 2
are very soft
are not reactive
19
Metals
are good conductors of heat and electricity.
are shiny and brittle.
are poor conductors of heat and electricity.
are good insulators.
20
An element with atomic number 6 and mass number 13 has how many neutrons?
6
19
13
7
21
Halogens
are very reactive
are in group 15
are all gases at room temperature
taste good with sushi
22
Why is the Periodic Table shaped the way it is?
Because of how electrons are distributed in energy levels
Because it has more metals than nonmetals
Because it has 18 groups
Because of the Noble Gases
23
Magnesium-24 has atomic number 12. How many neutrons does it have?
10
36
24
12

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