Read each description in the first column of the table...

Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. description Does any element with Z? 92 match the description? If you checked yes, give the symbol of an element with Z ? 92 that matches. An element in Period 6 and Group 1A. Yes No ? A nonmetal in Group 6A. Yes No ? A halogen with a higher atomic number than sodium. Yes No ? A transition element in Period 6. Yes No ? X 5

Transcript

00:01 So for this question, we're trying to find elements with an atomic number less than 92 that match these specific criteria.

00:12 So for question one, we need an element that is in period three and also in group 3a.

00:19 So remember, periods are the rows.

00:25 So we want an element in row three.

00:30 Row three, start.

00:31 With sodium and then you go across.

00:35 So if we go across, we want to find where the row three intersects with column three.

00:41 Remember groups are the columns.

00:47 So group three is going to be the column with boron, aluminum, etc.

00:57 So where period three or row three intersects group three or column 3 is going to be at aluminum, which has an atomic number of 13.

01:15 So your answer is going to be, yes, there is an element with an atomic number less than 92.

01:23 It's going to be aluminum.

01:26 Next, we have a non -metal in group 6a.

01:34 So if you're looking at the periodic table, remember the groups, are the columns.

01:40 So we're going to column 6a.

01:42 So column 6a has your elements, oxygen, sulfur, selenium, etc.

01:51 So we're looking for a non -metal.

01:53 So remember, non -metals are typically on the right side of the periodic table.

01:59 They're going to be your halides, your halogens, et cetera.

02:05 Look for the line for the transition metals.

02:09 A lot of time in the periodic table, they'll mark your metals.

02:11 Transition metals and non -metals in different colors...

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