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4 years ago

PLZZZZ NEEDDD HELPPPO‼️‼️

Chemistry

1 answer:

svlad2 [7]4 years ago

7 0

Answer:

1.) When Mendeleev arranged the elements in order of increasing atomic mass, the properties where repeated. Because the properties repeated themselves regularly, or periodically

2.) i can't really answer this one because it's not a direct question but if you get your periodic table and look at the list that it gave you look at which elements are in the same row and you you will get the correct answer that way

3.) and this question is referring back to question two so just pick one of the idem ( this means chose a name of an element) alkali elements and say because you mixed up alkaline and alkali and you figured it out by remembering what group and what row it was in

4.) name an element that can't be put into one group and chose this from the alkali group

5.) the number of valence electrons stays the same as you go up or down a group, but they increase as you go from left to right across the periodic table.

6.) sorry i don't really know how to explain this one

Explanation:

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Drag the tiles to the correct locations on the equation. Not all tiles will be used.

mel-nik [20]

Answer:

Tile 52 and three are incorrect

Explanation:

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2 years ago

Which is the correct name for p2o5? phosphorus dioxide phosphorus pentoxide diphosphorus pentoxide diphosphorus hexaoxide

Elenna [48]

Correct option:

The correct name for $P_{2}O_{5}$ is diphosphorus pentoxide.

Why $P_{2}O_{5}$ is called diphosphorus pentoxide?

$P_{2}O_{5}$ is commonly known as diphosphorus pentoxide.

Phosphorus pentoxide has an intriguing property in that $P_{2}O_{5}$ is actually its empirical formula, whereas $P_{4}O_{10}$ is its actual molecular formula.

However, the name of the chemical was obtained from its empirical formula rather than from its molecular formula. The official name for this substance is diphosphorus pentoxide.

Oxygen-containing binary compounds have "oxide" as their "last name." Phosphorus is the "first name."

We list each atom's numbers below:

The di- and Penta- prefixes are used to indicate the presence of two and five oxygen atoms, respectively, in the molecule.

Learn more about diphosphorus pentoxide here,

brainly.com/question/18237346

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2 years ago

The wheels of a car are able to spin due to the combustion of gasoline inside the car's engine. what type of energy transfer bes

REY [17]

I believe it is C, Chemical energy because of the changes in the gasoline burning, and mechanical energy because the wheels are moving.

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3 years ago

Isotopes of the same element have different numbers of<br> protons<br> electrons<br> neutrons

MrRa [10]

Answer:

Protons and electrons

Explanation:

They have a different number of neutrons giving them a different atomic weight while having the same charge

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3 years ago

How are the carbon, oxygen, and nitrogen cycles vital to sustaining life on Earth?. a.. Carbon, oxygen, and nitrogen are vital c

kumpel [21]

The correct answer is (D)

All the above are reasons the carbon , oxygen, and nitrogen cycles are vital to life on earth.

The explanation:

because :

1) Carbon, oxygen, and nitrogen are vital components of life on Earth.

2) The carbon, oxygen, and nitrogen cycles allow vital elements to return to usable form by organisms.

3)The carbon, oxygen, and nitrogen cycles are an important interface between biotic and abiotic factors

4) They are all biogeochemical cycles.

5) They all involve an interaction between living and nonliving elements.

6)They are all part of the Earth system.

5 0

3 years ago

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