8. which statement best explains why compounds have different properties than the elements that form them?

Answers

Answer 1

Answer:

Answer;

When elements form a compound, the bonds and structure of the elements change.

Explanation;

-Elements are substances (such as oxygen and hydrogen) that can't be split into simpler substances using chemical means. They contain only one kind of an atom. A compound on the other hand is a substance that is formed when two or more elements are chemically joined.

-A compound's properties may differ greatly from those of its component elements. For example; at room temperature both oxygen (O2) and hydrogen (H2) are gases, while water (H2O) is liquid. This means that when elements form a compound, the bonds and structure of the elements change. The atoms in a compound are joined chemically using chemical bonds, such as covalent bonds, ionic bond and hydrogen bonds among others.

Answer 2

Answer: Since options aren't given the responder will display the answer.

They are bonded by atoms.

The atoms in a compound are held together by a chemical bond. The chemical bonds can be either covalent bonds or ionic bonds. Both the bonds are considered very strong bonds. These bonds are mainly formed by sharing of electrons or in the case when one of the elements making the compound donates electron to the other element. The nucleus of each atom attracts to form a strong bond. This property of attraction between the nucleus of the atoms actually helps in forming the chemical bonds.

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Which test is used to diagnose allergies by measuring amounts of IgE in patients? a) ELISA b) RAST test c) PCR d) Western blot

Answers

Answer:

Explanation:

Blood tests for allergies measure IgE antibodies to certain allergens in the blood. The testing that is most often used is called RAST (radioallergosorbent test).

Which of the following resulted from codominance? 1)a person with AB blood type 2)a flower with pink petals 3)a rabbit with white fur 4)a mouse with brown fur

Answers

Answer:

The correct answer would be 1) a person with AB blood type.

Codominance is the condition in which both the alleles of the gene express themselves completely in the heterozygous condition.

AB blood group can be a perfect example of the codominance. Both the alleles (A and B) express themselves completely and lead to the formation of protein A (or antigen A) and protein B (antigen B) on the surface of the red blood cells.

A galaxy that has an unidentified shape is best classified as a(n)

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Irregular galaxy

A galaxy that has an unidentified shape is best classified as an irregular galaxy.

An irregular galaxy is a galaxy that has an undefined regular shape. These galaxies are composed of large amounts of young stars, gas, and dust. Irregular galaxies are usually small, disorderly in appearance, and without a nuclear bulge or any trace of spiral arm shape. Examples of irregular galaxies are the small and large magellanic clouds.

Invertebrates with "spine skin" are _____, which would include animals like _____.

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The answer is Echinoderms, which include starfish, sea urchins, sea cucumbers, and sand dollars.

The word Echinoderm is derived from Greek words which mean spiny skin. Their skin usually has spines which can be sharp and pointed out in different directions. The spines offer to echinoderms protection from predators.

How many atoms of nitrogen are in a chemical formula Ni(NO3)2?O 3
O 2
O 1
O 6

Answers

The answer is 2 because its the outside number and not in the parentheses

Answer:

just did test

Explanation:

What properties of iron bearing minerals on the seafloor support the theory of seafloor spreading?

Answers

It would be the start up of iron. Causing it to be a reactant and spread it across.

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