History of the atom + Electronic structure + periodic table Flashcards
TOF? Electrons were discovered before protons and neutrons
True
What was the plum pudding model
Described atoms as balls of positive charge with negative electrons stuck in it
which model replaced the plum pudding model
nuclear model
How were alpha particles were used to disprove the plum pudding model
Alpha particles were fired at thin sheets of gold
mst went straight through the gold, some bounced to the side and some bounced straight back
How did james chadwick contribute to understanding the atom
Provided evidence for the existence of neutrons
What did Niels Bohr suggest about the arrangements and movements of electrons in an atom
that electrons have fixed orbits around the nucleus of an atom
TOF? In an atom, the highest energy levels are filled by electrons first
False
How many electrons are needed to fill the first shell of an atom
2
What is the maximum amount of electron in the second and so on shells?
8
Explain the electron arrangement in oxygen (8 electrons)
2,6
Explain the electron arrangement in phosperhous (15 electrons)
2,8,5
Explain the electron arrangement in magnesium (12 electrons)
2,8,2
How were elements arranged in the first ever periodic table
Relative Atomic Mass (RAM)
TOF? Mendeleev considered the properties of isotopes when constructing the peroidic table
False. isotopes were not discovered yet
What is the name of the vertical sections of the periodic table
the columns are known as groups
