2. Natural gas or methane is a fossil fuel. In a plentiful supply of air, it burns to give carbon dioxide and water.

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

Element before carbon on the periodic table