how many neutrons and electrons could a negative ion of sulfur have

ATI TEAS 7

Practice Science TEAS Test

1. How many neutrons and electrons could a negative ion of sulfur have?

A. 16 neutrons, 16 electrons
B. 16 neutrons, 17 electrons
C. 17 neutrons, 16 electrons
D. 17 neutrons, 17 electrons

Correct answer: B

Rationale: A negative ion of sulfur would have 16 protons and 17 electrons since it gains one electron. The number of neutrons in an ion does not change, so the neutrons would remain at 16. Therefore, the correct answer is 16 neutrons and 17 electrons, which corresponds to choice B. Choice A is incorrect as it does not account for the extra electron gained by the negative ion. Choices C and D are incorrect because they propose a change in the number of neutrons, which is not affected by the ionization process.

2. Which of the following is NOT a component of the body's innate immune response?

A. Physical barriers like skin and mucous membranes
B. Phagocytes that engulf and destroy pathogens
C. Inflammatory response to isolate and contain infection
D. Production of antibodies specific to a particular pathogen

Correct answer: D

Rationale: The production of antibodies specific to a particular pathogen is a function of the adaptive immune response, not the innate immune response. Innate immunity involves nonspecific defense mechanisms like physical barriers, phagocytes, and inflammation, which provide immediate protection against pathogens without prior exposure. Antibody production is a characteristic of adaptive immunity, where the body generates specific antibodies in response to encountering a pathogen for the first time. Therefore, option D is the correct answer as it does not align with the immediate and nonspecific nature of the innate immune response.

3. How many electrons are typically found in each shell of a neutral aluminum atom with 13 electrons in its electron cloud?

A. 6 in the first shell, 7 in the second shell
B. 2 in the first shell, 11 in the second shell
C. 2 in the first shell, 8 in the second shell, 3 in the third shell
D. 3 in the first shell, 5 in the second shell, 5 in the third shell

Correct answer: C

Rationale: In a neutral aluminum atom with 13 electrons, the electron distribution typically follows the electron shell filling order based on the Aufbau principle. The first shell can hold a maximum of 2 electrons, the second shell can hold up to 8 electrons, and the third shell can hold up to 8 electrons as well. Therefore, the distribution would be 2 electrons in the first shell, 8 electrons in the second shell, and 3 electrons in the third shell, totaling 13 electrons. Choice A is incorrect as it exceeds the maximum number of electrons the shells can hold. Choice B is incorrect as it does not distribute the electrons correctly among the shells. Choice D is incorrect as it also does not distribute the electrons correctly among the shells.

4. Therefore, because, and accordingly are examples of which type of signal words?

A. Emphasis words
B. Compare/contrast words
C. Cause-and-effect words
D. Temporal sequencing words

Correct answer: C

Rationale: The correct answer is C. 'Therefore,' 'because,' and 'accordingly' are examples of cause-and-effect signal words. These words indicate a relationship between actions or events where one causes or results in another. Choice A, 'Emphasis words,' is incorrect as the given signal words do not emphasize a point but rather show cause and effect. Choice B, 'Compare/contrast words,' is incorrect as these signal words do not indicate a comparison or contrast between two ideas. Choice D, 'Temporal sequencing words,' is incorrect as the signal words provided do not specifically denote a sequence of events over time, but rather a cause-and-effect relationship.

5. The phrase 'labyrinths of lamplighted city' contains an example of what?

A. Hyperbole
B. Simile
C. Metaphor
D. Alliteration

Correct answer: D

Rationale: The correct answer is D, 'Alliteration.' The phrase 'labyrinths of lamplighted city' uses alliteration by repeating the 'l' sound, creating a rhythmic and vivid image of a city illuminated by lamps. Alliteration is the repetition of initial consonant sounds in neighboring words, and in this case, it enhances the description of the city in the reader's mind. Choices A, B, and C are incorrect because there is no exaggeration (hyperbole), comparison using 'like' or 'as' (simile), or direct comparison without using 'like' or 'as' (metaphor) present in the phrase.