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Lapatulllka [165]
3 years ago
8

Complete the sentence. Select all that apply. In the vertical columns of the periodic table:

Chemistry
2 answers:
Sever21 [200]3 years ago
3 0
All of them are pretty correct except the last one, can't really give you a definite answer sorry. <span />
IgorC [24]3 years ago
3 0

Answer:  Atomic weight increases from top to bottom and the number of shells increases from top to bottom

Explanation:  As we go down the group that is vertical column, atomic weight increases as atomic number is increasing.

Moreover the number of electrons in the outershell does not increases but the number of shells increases from top to bottom as atomic number are increasing and electrons are increasing thus more number of shells are needed to fill these electrons.

Physical Properties doesnot remain identical as they do changes on going down the groiup.

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A substance that consist of two elements is one IN WHICH THE ELEMENTS ARE CHEMICALLY COMBINED IN A FIXED PROPORTION.
A compound is a substance that is made up of two or more elements which have undergone chemical reaction together and their individual properties have been lost during the reaction, thus a compound has properties that are different from those of its constituents elements. Compounds are usually combined in specific fixed ratio.<span />
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3 years ago
Someone help me i don’t understand it
Troyanec [42]
Use PV=nRT to help you
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What is the average atomic mass!?
Agata [3.3K]

Answer:

he average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance

6 0
3 years ago
In a varve, summer is represented by _____.
Tasya [4]

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2 years ago
HELPPP!!! what is the volume (in liters) of a 5.72 gram sample of 02 at STP? (Hint: remember to change grams of oxygen to moles
Alona [7]

Answer:

4L

Explanation:

To obtain the volume of O2 at stp, first, we need to determine the number of mole of O2.

From the question given above,

Mass of O2 = 5.72g

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Number of mole =Mass/Molar Mass

Number of mole of O2 = 5.72/32

Number of mole of O2 = 0.179 mole

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