Question

Help with explanation if possible.

Nae Section -Date Now let's look at chlorine A chlorine atom has how many protons Therefore, we know that a chlorine atom has how many electrons? How many electrons will go in the first shell? How many in the second shell? Nucleus How many in the third? Draw this in Figure 2.2 We know that a chlorine atom requires eight electrons in its valence shell to become stable. Will it be easier for chlorine to steal one electron from another atom, or will it be easier for chlorine to take an electron from another atom than to try to pawn off seven electrons. This means that chlorine will gain an electron (negative charge) but will keep the same number of RGURE 2.2 Orbital model of an atom protons (positive charges).What charge will chlorine (now called a chloride ion) have now? Let's tie this in with what we learned about metals and nonmetals earlier electrons to become We said that metals Is sodium a metal or a nonmetal? Looking at our example above, did sodium donate or accept an electron? We also said that nonmetals Is chlorine a metal or a nonmetal? Looking at our example above, did chlorine donate or accept an electron? electrons to become Why do we care? Well, when sodium donates an electron to become a positively charged cation, and chlorine accepts an clectron to become a negatively charged anion, this creates an attraction. (Think of it like "opposites attract.-" This attraction leads the two ions to bond to one another, forming an ionic bond. See how simple that is? Chemistry UNIT 2 41

Answer 1

protons in Cl- 17

electrons -17

first shell- 2e

second shell-8e

third shell- 7e

fill ups-

metals donate electron to become cations.

sodium is a metal

sodium donate electron

nonmetals accept electron to become anion

chlorine is a non metal

chlorine accept electron.