How many valence electrons are in an atom with the electron configuration in example a? example a: 1s22s22p63s23p64s24p2 22 2 4 6

What does earth’s rotation on its axis cause? the tides night and day passing of years phases of the moon

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils