Q: What forms when an atom gains electrons? Read this paragraph and choose the correct option from the provided answers: Anions form when an atom gains electrons. Nonmetallic atoms typically gain enough electrons to obtain the same electron configuration as the nearest noble gas. All the elements in Group 17 have seven valence electrons, which are arranged into an outer configuration of n s 2 n p 5 . To achieve a noble gas configuration ( n s 2 n p 6 ), each of these elements needs to gain just one electron, resulting in an anion with a 1 charge. Similarly, Group 16 elements can obtain an n s 2 n p 6 valence configuration by forming ions with a 2 charge, and the Group 15 nonmetals will form ions with a 3 charge. Naming anions is slightly different than naming cations. The end of the element's name is dropped and replaced with the ide suffix. For example, when the chlorine atom (Cl) gains one electron, it becomes the chloride ion (Cl - ). This structure has the same electron configuration as the noble gas argon. Similarly, sulfur can gain two electrons to become the sulfide ion (S 2- ), which also has a noble gas configuration. Choices: - cations - bonds - crystals - anions A:
anions

(Question)
Q: What is another term for chemical messenger molecules? Read this paragraph and choose the correct option from the provided answers: an endocrine system with glands that secrete chemical messenger molecules called hormones. Choices: - pheromones - enzymes - acids - hormones A:
(Answer)
hormones

Ques: Q: Minerals are grouped based on what? Read this paragraph and choose the correct option from the provided answers: Minerals are divided into groups. The groups are based on their chemical composition. Choices: - carbon composition - mineral composition - density - chemical composition A:
Ans: chemical composition

(Q).
Q: What is a rigid layer that surrounds the plasma membrane of a plant cell? Read this paragraph and choose the correct option from the provided answers: The cell wall is a rigid layer that surrounds the plasma membrane of a plant cell. It supports and protects the cell. Tiny holes, or pores, in the cell wall allow water, nutrients, and other substances to move into and out of the cell. The cell wall is made up mainly of complex carbohydrates, including cellulose. Choices: - the nucleic wall - the cell center - mitochondria - the cell wall A:
(A).
the cell wall

Ques:Q: Life on earth is carbon-based. organisms need not only energy but also carbon ________ for building bodies? Read this paragraph and choose the correct option from the provided answers: Life on Earth is carbon-based. Organisms need not only energy but also carbon atoms for building bodies. For nearly all life, the ultimate source of carbon is carbon dioxide (CO 2 ), an inorganic molecule. CO 2 makes up less than 1% of the Earth's atmosphere. Choices: - monoxide - ions - crystals - atoms A:

Ans:atoms

Ques:Q: Opportunistic diseases are usually the direct cause of death of people with what disease? Read this paragraph and choose the correct option from the provided answers: boundary between air masses that is stalled in one place. Choices: - heart - parkinson - liver - aids A:

Ans:
aids