Choose one topic that will be your favorite this and plants, design, food chains, the changing earth, people and resources, the moon, matter or machines

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Which of these reactions are redox reactions? check all that apply.cd + hcl → cdcl2  + h2cucl2  + na2s → 2nacl + cuscaco3  → cao + co2          2zns + 3o2  → 2zno + 2so2          ch4  + 2o2  → co2  + 2h2o

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged