CHEMISTRY HIGH SCHOOL

Which of these statements is correct about how the first forms of life appeared on Earth?A.Non-living molecules evolved into living molecules by chemical changes.
B.Reproducing molecules evolved into living organisms by biological processes.
C.Rocks and fossils were transformed into living molecules by biological processes.
D.Atmospheric gases were transformed into living organisms by chemical changes.

Answers

Answer 1
Answer:

the answer to your question would be A


hope i heled
Answer 2
Answer:

Answer:

A.  Non-living molecules evolved into living molecules by chemical changes.

Explanation:

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Which of the following elements is stable? A. Boron, atomic number 5
B. Neon, atomic number 10
C. Fluorine, atomic number 9
D. Carbon, atomic number 6

Answers

Answer: Option (B) is the correct answer.

Explanation:

An atom is stable when it has completely filled orbitals. This means that K shell have 2 electrons, L shell have 8 electrons, M shell have 18 electrons and so on.

Therefore, electronic distribution of given elements will be as follows.

Boron has electronic configuration 2, 3.

Neon has electronic configuration 2, 8.

Fluorine has electronic configuration 2, 7.

Carbon has electronic configuration 2, 4.

Therefore, out of the given elements neon is stable.

The element that is stable among the options given is B. Neon, with atomic number 10.

Which is stable element?

Stability in the context of elements refers to having a filled outer electron shell, typically with eight electrons, known as an octet. Neon, a noble gas, has a complete octet with two electrons in the first shell and eight electrons in the second shell.

In contrast, elements like Boron (atomic number 5), Fluorine (atomic number 9), and Carbon (atomic number 6) do not have a complete octet in their outermost electron shells. They tend to form chemical bonds and engage in chemical reactions to achieve a stable electron configuration. Option B

Learn more about element at brainly.com/question/20096027

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List the different types of fuel that are made from crude oil

Answers

well there are quite a few so ima going to give you like four Finished motor gasoline,Distillate fuel,Kerosene-type jet fuel3, and coke 

Many of water's emergent properties, such as its cohesion, its high specific heat, and its high heat of vaporization, result from the fact that water molecules _____. a) tend to repel each other.b) are very small.
c) are in constant motion.
d) are extremely large.
e) are electrically attracted to each other.

Answers

Answer: are electrically attracted to each other

Explanation:Water molecules are attracted to each other by partial negative and positive charges on the oxygen and hydrogen atoms, respectively
The water molecules are electrically attracted to each other tend to repel because they want to move freely

Write a general statement that describes the periodic trend in the solubility of alkaline earth metal compounds.

Answers