Some elements located on the periodic table in groups 3 to 12 have valence electrons in the d - or f - orbitals. What are these elements called?

A. representative elements

B. transitional elements

C. actinides

D. lanthinides

Which of the following is a probable source of Earth's magnetic field? a) The earths tides b) earths outer iron core c) the sun d) the moon

If an atom has 3 energy levels, how many sublevels should it have? 1 2 3 4

The phase of the moon you see depends on a. where you are on Earth's surface. b. how much of the sunlit side of the moon faces Earth. c. how much of the moon's surface is lit by the sun. d. whether or not an eclipse is occurring.

Find the molarity of a 40.0 % by mass aqueous solution of sulphuric acid H2SO4 for which the density is 1.3057 g/ml

What, if any, is the relationship between atomic radius, ionization energy and electronegativity?

Consider the elements bromine and chlorine; which element has a larger ionic radius? -chlorine -bromine

How many electrons can the first energy level hold

Chemistry Lab Question: Filtration Compare the size the particles of refined sand with the size of particles of the dissolved salt in the mixture? Compare the size of the pores in the filter paper, to the sizes of the sand and salt particles?

What is the [oh-] in a sample of lime juice with a ph of 2.0?

What is the subscript present in NaCl?