If E is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. E 2. E 3. E 4. E

A. 1 and 2
B. 3 and 4
C. 1 and 4
D. 2 and 3

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.

What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.