Electrons and the Periodic Table Quiz
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Which is the noble-gas notation for lead (Pb)?
O [Rnj6s?4(l 4541°6p?
O (Rn]6s?5d1°6p?
O Xej6s?4fl45d1°6p?
O Kej6s?5d1°6p?

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium