(02.02 MC) Two friends at different locations want to communicate with each other by sending low energy signals. Which of the following methods can they use to communicate?

(02.04 MC) The table compares the number of electrons in two unknown neutral atoms. Comparison of Electrons Atom Number of Electrons A 2 D 10 Use this information to determine the number of valence electrons in the atoms. Which of the following correctly compares the stability of the two atoms?

(02.06 LC) Which of the following groups of elements are likely to have elements in the three states of matter?

(02.01 HC) The table shows the number of charged subatomic particles in an ion. Charged Particles Charge on Particle Number of Particles Positive 12 Negative 10 A positively charged substance is brought near the ion. What will most likely happen and why?

(04.03 LC) Which of the following steps can be used to identify an acid-base reaction?

(04.04 LC) Which of the following is true for combustion reactions?

(04.02 MC) Jane made this picture to represent a chemical reaction:Which of the following statements best explains the type of chemical reaction represented by Jane’s picture?

(04.06 LC) Which of the following statements is true about nuclear fusion?

(04.03 MC) Part 1: Name the type of chemical reaction that occurs when calcium hydroxide (Ca(OH)2) reacts with nitric acid (HNO3).Part 2: Explain why zinc (Zn) would react with lead nitrate (Pb(NO3)2) but not with calcium chloride (CaCl2).

(04.04 MC) Read the following chemical equation.Fe(s) + O2 (g) → Fe3+ O2−What most likely happens during this reaction?