Which of the following is the atomic number of an atom that has 12 protons and 12 neutrons?

A. 24

B. 1

C. 12

D. 144

Answer Explanation:

The atomic number of an atom is defined as the number of protons in its nucleus. Protons are positively charged particles that make up part of the atomic mass, along with neutrons, which have no charge. The number of neutrons can vary for atoms of the same element, resulting in different isotopes. However, the number of protons is always constant for a given element. Therefore, to find the atomic number of an atom that has 12 protons and 12 neutrons, we only need to look at the number of protons.

Therefore, the Correct Answer is C.

Q #1: Hikers who found a human body at high altitude in the Italian Alps thought the man had died recently, but tests indicated he was shot with an arrow more than 5,300 years ago. Which of the following would be the best reason for prolonged preservation of the body?

A. The food that the person ate contained toxins that killed the bacteria that would have otherwise destroyed the body.

B. The ultraviolet rays at such a high altitude caused all the body's molecules to be preserved.

C. The arrow wound caused blood to flow out of the body, which led the enzymes that would break down tissue to be cleared from the body.

D. The body was frozen in the cold temperature of the Alps shortly after he died and remained frozen until it was found.

Answer Explanation

The answer lies in the environmental conditions of the Alps. The body was quickly frozen by the low temperature and covered by snow and ice, which prevented exposure to air, moisture, and microorganisms. The freezing also slowed down the chemical reactions that would normally break down the body's cells and tissues. Thus, the body was preserved in a natural mummy state until it was discovered by modern humans.
Q #2: Which of the following is the main function of centrosomes in animal cells?

A. Organelle trafficking

B. Pathogen digestion

C. Microtubule organization

D. Cytoplasm formation

Answer Explanation

Centrosomes are small structures that are found near the nucleus of animal cells. They consist of two centrioles that are surrounded by a protein matrix called the pericentriolar material. The main function of centrosomes is to organize the microtubules, which are long, hollow tubes that form part of the cytoskeleton. Microtubules are involved in many cellular processes, such as cell division, cell movement, and intracellular transport. Centrosomes act as the main microtubule-organizing centers (MTOCs) in animal cells, meaning that they nucleate and anchor the microtubules
Q #3: Which of the following is the process in which an ovarian follicle matures and releases a reproductive egg?

A. Oogenesis

B. Ovulation

C. Menstruation

D. Fertilization

Answer Explanation

The process in which an ovarian follicle matures and releases a reproductive egg is called ovulation. Ovulation is one of the phases of the menstrual cycle, which also includes follicular phase, luteal phase and menstruation

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Which of the following is the atomic number of an atom that has 12 protons and 12 neutrons?

More Questions on TEAS 7 Science

Q #1: Hikers who found a human body at high altitude in the Italian Alps thought the man had died recently, but tests indicated he was shot with an arrow more than 5,300 years ago. Which of the following would be the best reason for prolonged preservation of the body?

Answer Explanation

Q #2: Which of the following is the main function of centrosomes in animal cells?

Answer Explanation

Q #3: Which of the following is the process in which an ovarian follicle matures and releases a reproductive egg?

Answer Explanation

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