Blog

(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?

(04.03 MC) Part 1: Name the type of chemical reaction that occurs when aluminum (Al) reacts with copper nitrate (Cu(NO3)2).Part 2: Explain why aluminum does not react with potassium nitrate (KNO3) although it reacts with copper nitrate.

(02.06 LC) A substance is a good conductor of electricity. Which of the following best explains the probable position of the substance in the periodic table?

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

(02.07 MC) Which of the following correctly compares the radii of Cl and Cl−?

(02.02 LC) What is the lowest point of a wave called?

(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?

(04.03 LC) Which of the following steps can be used to identify a single replacement reaction?

(04.04 MC) The table shows four reactions. Reactions Reaction Equation 1 C3H8 + 5O2 → 3CO2 + 4H2O 2 C6H12O6 + 6O2 → 6CO2 + 6H2O 3 AgNO3 + NaCl → AgCl + NaNO3 4 2Fe + O2 → 2FeO Which of the above reactions is an example of a combustion and also a synthesis reaction?

(02.04 MC) An atom’s configuration based on its number of electrons ends at 3p2. Another atom has eight more electrons. Starting at 3p, what would be the remaining configuration?