Which element has the electron configuration [Xe] 6s2 4f14 5d10 6p2?

A certain material has a mass of 565 g while occupying 50 cm3 of space. what is this material?

When magnesium combines with sulfur to form magnesium sulfide, it is oxidized to Mg2+. Which statement is true about this reaction? A. It involves gain of electrons. B. It involves loss of electrons. C. It involves loss of oxygen. D.

37 Which general trends in first ionization energy and electronegativity values are demonstrated by Group 15 elements as they are considered in order from top to bottom? (1) The first ionization energy decreases and the electronegativity decreases.

Perform the following calculations. Express the answers with the correct number of significant figures. a) 7 g - 3.5 g - 2.75 g = b) 200.00 kg - 199.0 kg = c) 25 L - 3.0 L = d) 0.67 cm + 2.0 cm + 0.090 cm = e) 104.5 g + 0.40 g =

Name a cyclic unsaturated hydrocarbon containing Three double bonds

What is the main function of antibodies? A: "Remembering" the characteristics of germs that have invaded your body in the past B: Creating new white blood cells C: binding themselves to invading antigens D:Signaling your immune system that antigens

In the reaction 2H2O (l) + 2Cl - (aq) → H2 (g) + Cl2 (g) + 2OH - (aq), which substance is reduced? A. H2O B. Cl C. H D. OH E. None of the Above (This is not a redox reaction.)

Which statements about the periodic table's organization are true? Select all that apply. The periodic table is organized by atomic number. The periodic table is organized by reactivity. The periodic table is organized by atomic mass.

He definition "'oxygen' means an element having an atomic weight of 8 and an atomic number of 16" is an example of:

From oxygen silicon chlorine argon which one is a metalloid