use the data table below to answer question 9.\n\n9. which atom has a net positive charge?\n(a) atom w\n(b)…

use the data table below to answer question 9.\n\n9. which atom has a net positive charge?\n(a) atom w\n(b) atom x\n(c) atom y\n(d) atom z\n\n10. based on the statements below, how are atoms a and b related?\natom a has 9 protons, 10 neutrons, and 9 electrons\natom b has 9 protons, 9 neutrons, and 9 electrons\n(a) a and b are isotopes of the same element.\n(b) a is an ion and b is a neutral atom.\n(c) a and b are different elements.\n(d) a is neon and b is fluorine.\n\n11. a solution of silver nitrate reacts with a solution of potassium chloride producing a solid, white precipitate at the bottom of the test tube according to the reaction below.\nagno₃(aq) + kcl(aq) → agcl(s) + kno₃(aq)\ndoes the combination of these solutions result in a chemical or physical change?\n(a) physical change - the end result can be physically separated and each substance has distinct properties\n(b) physical change - there is no change in identity from the beginning substances, atoms are only rearranged\n(c) chemical change - new substances are created with unique properties and identities\n(d) chemical change - the products are different phases than the reactants

use the data table below to answer question 9.\n\n9. which atom has a net positive charge?\n(a) atom w\n(b) atom x\n(c) atom y\n(d) atom z\n\n10. based on the statements below, how are atoms a and b related?\natom a has 9 protons, 10 neutrons, and 9 electrons\natom b has 9 protons, 9 neutrons, and 9 electrons\n(a) a and b are isotopes of the same element.\n(b) a is an ion and b is a neutral atom.\n(c) a and b are different elements.\n(d) a is neon and b is fluorine.\n\n11. a solution of silver nitrate reacts with a solution of potassium chloride producing a solid, white precipitate at the bottom of the test tube according to the reaction below.\nagno₃(aq) + kcl(aq) → agcl(s) + kno₃(aq)\ndoes the combination of these solutions result in a chemical or physical change?\n(a) physical change - the end result can be physically separated and each substance has distinct properties\n(b) physical change - there is no change in identity from the beginning substances, atoms are only rearranged\n(c) chemical change - new substances are created with unique properties and identities\n(d) chemical change - the products are different phases than the reactants

Answer

Question 9

Explanation:

Step1: Calculate the charge for each atom

The charge of an atom is calculated as (Charge = Number\ of\ Protons - Number\ of\ Electrons) For Atom (W): (Charge = 3 - 3=0) For Atom (X): (Charge = 53 - 54=- 1) For Atom (Y): (Charge = 55 - 54 = + 1) For Atom (Z): (Charge = 1 - 1=0)

Answer:

C. Atom Y

Question 10

Explanation:

Step1: Recall the definition of isotopes

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. Atom (A) and Atom (B) have the same number of protons ((9)) but different numbers of neutrons ((10) for (A) and (9) for (B))

Answer:

A. A and B are isotopes of the same element.

Question 11

Explanation:

Step1: Recall the definition of chemical and physical change

A chemical change is a process in which new substances are formed. In the reaction (AgNO_{3}(aq)+KCl(aq)\to AgCl(s)+KNO_{3}(aq)), new substances ((AgCl) and (KNO_{3})) are created. A physical change does not create new substances. Option A and B are wrong because new substances are formed. Option D is wrong because the difference in phases is not the key criterion for a chemical change (the key is new substances formation)

Answer:

C. Chemical change - new substances are created with unique properties and identities