• If E is the symbol for an element, which two of the following symbols represent isotopes of the same element?*
24
1. 12
24E
25
E
2. 12
24
E
3. 14
0 1 and 2
0 1 and 3
O 2 and 3

If a planet rotates 360 degrees during a 24 hour time period, what does that tell us about the planet? a. the middle of the planet is in darkness b. the seasons on the planet vary every day. c. the planet runs on a 12-hour time clock. d. the temperature on the planet varies daily.

Afamily is one another name for a group on the table of elements.

Consider this initial-rate data at a certain temperature for the reaction described by