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Mashcka [7]
3 years ago
5

Explain why the periodic table is not a normal table of rows and columns​

Chemistry
1 answer:
Norma-Jean [14]3 years ago
7 0

The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.

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What happens to friction when two objects are pressed together with more force?
DerKrebs [107]

Answer:

Friction increases.

Explanation:

hhhh its correct i just took the test dude.

3 0
3 years ago
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Nitrogen fixation requires a great deal of energy because the N₂ bond is strong.(d) What would be the most obvious environmental
AleksandrR [38]

Each mole of nitrogen that microbes fix requires the breakdown of 16 moles of ATP (adenosine triphosphate). The energy needed by these microbes is obtained by oxidizing organic compounds. In other words, the nitrogenase enzyme must use a significant amount of energy to convert N2 to NH3.

The great majority of nitrogen on Earth exists as molecular N2, and before to the agricultural and industrial revolutions, the only significant mechanism producing reactive nitrogen was biological nitrogen fixation. Any natural or artificial process known as nitrogen fixation causes free nitrogen (N2), a relatively inert gas present in large quantities in the atmosphere, to chemically interact with other elements to generate more reactive nitrogen compounds like ammonia, nitrates, or nitrites. carbon cycle.

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brainly.com/question/859444

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7 0
1 year ago
What is the percent composition of C4H10? (4 points)
Marina CMI [18]

Answer:82.7% C and 17.3% H

Explanation:

C4 = 12.0107g/mol x 4 = 48.0428 g/mol

H10 = 1.00794 g/mol x 10 = 10.0794 g/mol

Molar Mass of Butane, C4H10 =  48.0428 g/mol + 10.0794 g/mol= 58.1222 g/mol

percent composition of Carbon is  = ( mass of carbon contained in butane / molar mass of Butane) x 100

=(48.0428 /58.1222) x 100% = 0.8265 x 100

=82.65% =82.7% of Carbon.

Percent composition of Hydrogen  = (mass of Hydrogen contained in Butane / molar mass of Butane )x 100  

( 10.0794/58.122 ) x 100% =0.1734 x 100

= 17.3% OF Hydrogen.

6 0
4 years ago
What mass of nacl is in 2.5L of 0.207M solution?
frosja888 [35]
0.409 g!


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8 0
3 years ago
What is the correct electron configuration of the element with atomic number 20?
IgorLugansk [536]

Answer:

D is the correct answer

s orbital contain 2

p orbital contains 6

3 0
3 years ago
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