Chemistry, 09.10.2019 04:10, zeckwielen3398
He image shows the representation of an unknown element in the periodic table.
a square is shown. inside the square nine is written at the top righthand side. to the middle left side, symbol is written. below it name is written. and further below near the bottom edge of the square, eighteen point nine nine eight four is written.
based on the representation, which of the following statements about the element is true?
the combined number of protons plus electrons is 9.
the number of neutrons in an atom of the element is 10.
the combined mass of neutrons and electrons is 18.9984.
the sum of the masses of protons and electrons is 18.9984
Answers: 2
Chemistry, 22.06.2019 09:00, boxergirl2062
Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?
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Chemistry, 22.06.2019 11:00, coco8560
Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.
Answers: 1
He image shows the representation of an unknown element in the periodic table.
a square...
a square...
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