Question Video: Pairing Terms Related to Atoms and Ions with Relevant Descriptions | Nagwa Question Video: Pairing Terms Related to Atoms and Ions with Relevant Descriptions | Nagwa

Question Video: Pairing Terms Related to Atoms and Ions with Relevant Descriptions Science • First Year of Preparatory School

What is the correct pairing of the terms and descriptions shown in the boxes below? [A] 1C, 2A, 3B [B] 1A, 2B, 3C [C] 1B, 2A, 3C [D] 1B, 2C, 3A [E] 1A, 2C, 3B

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Video Transcript

What is the correct pairing of the terms and descriptions shown in the boxes below? (A) 1C, 2A, 3B; (B) 1A, 2B, 3C; (C) 1B, 2A, 3C; (D) 1B, 2C, 3A; (E) 1A, 2C, 3B.

Let’s start by looking at an atom. This is an atom of deuterium, an isotope of hydrogen. This atom has one neutron, one proton, and one electron. Neutrons are neutral, protons have a positive charge, and electrons have a negative charge. As an atom has the same number of positively charged protons and negatively charged electrons, it is neutral overall. So, an atom is an electrically neutral particle with an equal number of electrons and protons.

Now, let’s look at what happens when a hydrogen atom gains one additional electron. Now there’s one neutral neutron, one positively charged proton, and two negatively charged electrons. This species has an overall negative charge and is called a negative ion. So, a charged particle that has a greater number of electrons than protons is a negative ion. But what happens to a hydrogen atom if it loses an electron? This species has one neutral neutron and one positively charged proton, but no negatively charged electrons. So, this species has an overall positive charge and is called a positive ion. So, a charged particle that has a smaller number of electrons than protons is called a positive ion.

In conclusion, the correct pairing of the terms and descriptions shown in the boxes below is answer choice (D): 1B, 2C, 3A.

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