Match the element with its description.

Sodium A) Nonreactive gas

Silicon B) Has properties of both metals and nonmetals

Bromine C) Highly reactive gas

Argon D) Malleable, soft, and shiny

Which of the following is in the same group as magnesium (Mg) ? Question 1 options: calcium (Ca) sodium (Na) tungsten (W) uranium (U)

What mass of magnesium chloride is needed to make 100.0 mL of a solution that is 0.500 M in chloride ion?

Element x is a solid that is brittle, lacks luster, and has six valence electrons. In which group of the periodic table would element x be found 1) 1 2) 2 3) 15 4) 16

What has its own size and shape

Why is a control needed in a valid experiment?

According to Newtons's first law, which characteristic of a moving object would remain constant if there were no other force of acting of it? A. Size B. Mass C. Shape D. Speed

Standard reduction potentials are 1.455 V for the PbO2 (s) / Pb (s) couple, 1.82 V for Co3 (aq) / Co2 (aq), 3.06 V for F2 (g) / HF (aq), 1.07 V for Br2 (l) / Br - (aq), and 1.77 V for H2O2 (aq) / H2O (l).

Which compound is inorganic? a. glucose (c6hl2o6) b. carbon dioxide (co2) c. ethane (c2h6) d. stearic acid (cl8h36o2) ?

Pure aluminum metal has a density of 2.70 g/cm

A 0.250-g chunk of sodium metal is cautiously dropped into a mixture of 50.0 g of water and 50.0 g of ice, both at 08C. The reaction is 2Na (s) 1 2H2O (l) 88n 2NaOH (aq) 1 H2 (g) DH 5 2368 kJ