Ireally need question 1 (1 point) question 1 unsaved orbitals are defined by which of the following? question 1 options: number of electrons spin direction energy level composition save question 2 (1 point) question 2 unsaved an atom has 14 protons and 14 neutrons. what is the chemical symbol for the atom? consult the periodic table. question 2 options: al cr mg si save question 3 (1 point) question 3 unsaved an atom has an average atomic mass of about 63.5 amu. what is the chemical symbol for the atom? consult the periodic table. question 3 options: pb cu eu fe save question 4 (1 point) question 4 unsaved an atom has a charge of –3 in its orbitals. which statement must be true in order for this atom to have no net charge? question 4 options: there are three neutral neutrons in the nucleus. there are three positively charged protons in the nucleus. there are two positively charged protons in the nucleus and one in an orbital. there are three positively charged protons outside the nucleus. save question 5 (1 point) question 5 unsaved the number of protons in the nucleus of an atom is equivalent to which of the following? question 5 options: mass number atomic weight atomic number number of neutrons save question 6 (1 point) question 6 unsaved you heat two substances, a and b. both substances change color. when cooled, substance a returns to its original color, but substance b does not. what most likely happened? question 6 options: a chemical change occurred in both substances. a chemical change occurred in substance a, and a physical change occurred in substance b. a physical change occurred in both substances. a physical change occurred in substance a, and a chemical change occurred in substance b. save question 7 (1 point) question 7 unsaved a material has a density of 8.9 g/cm3. you have six cubic centimeters of the substance. what is the material's mass in grams? question 7 options: 5.9 g 107 g 3.0 g 53 g save question 8 (1 point) question 8 unsaved which of the following describes an element? question 8 options: c2h6 h2o2 cuso4 ci2 save question 9 (1 point) question 9 unsaved which of the following goes on the x-axis of a graph? question 9 options: trend line independent variable values graph title dependent variable values save question 10 (1 point) question 10 unsaved a container has the dimensions of 30 cm x 50 mm x 0.2 m. the density of its contents is 2.5 g/cm 3. what is the mass of the substance in kilograms? ( d = m/v) question 10 options: 150 kg 75 kg 0.75 kg 7.5 kg save