ati teas 7 science

Questions 173

ATI TEAS 7

ATI TEAS 7 Test Bank

ati teas 7 science Questions

Question 1 of 5

Which of the following is a balanced chemical equation?

Correct Answer: B

Rationale: The correct answer is B: 2H2 + O2 → 2H2O. This equation is balanced because there are equal numbers of each type of atom on both sides of the equation. Balancing involves adjusting the coefficients to ensure the conservation of mass. In this case, there are 2 hydrogen atoms on each side and 2 oxygen atoms on each side, making it balanced. Explanation for other choices: A: H2 + O2 → H2O - Not balanced, as there are 2 hydrogen atoms on the left but only 1 on the right. C: 3H2O → 2H2 + O2 - Not balanced, as there are 6 hydrogen atoms on the left but only 2 on the right. D: H2O → H2 + O2 - Not balanced, as there are 1 oxygen atom on the left but 2 on the right.

Question 2 of 5

What is the difference between the atomic number and the mass number of an atom?

Correct Answer: A

Rationale: The correct answer is A because the atomic number represents the number of protons in the nucleus of an atom, which determines the element's identity. The mass number is the total number of protons and neutrons in the nucleus, indicating the atom's mass. The number of electrons is not directly related to either the atomic or mass number, eliminating choices B and D. Choice C is incorrect because the atomic number specifically refers to the number of protons, not neutrons. Thus, choice A is the only accurate explanation of the difference between the atomic number and the mass number.

Question 3 of 5

Which structure is the largest part of the airway?

Correct Answer: D

Rationale: The correct answer is D: Trachea. The trachea is the largest part of the airway. It is a tube that connects the larynx to the bronchi, allowing air to pass into and out of the lungs. The trachea is larger than the bronchi, bronchioles, and alveoli. Alveoli are tiny air sacs in the lungs where gas exchange occurs. Bronchi are the main air passages into the lungs, branching off from the trachea. Bronchioles are smaller branches of the bronchi. Therefore, the trachea is the largest structure among the given choices, making it the correct answer.

Question 4 of 5

What is the unit of measurement for density?

Correct Answer: A

Rationale: Failed to generate a rationale after 5 retries.

Question 5 of 5

An uncharged atom has an electron configuration of 1s� 2s� 2p⁶ 3s� and a mass number of 14. How many protons does it have?

Correct Answer: B

Rationale: Failed to generate a rationale after 5 retries.

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