Chemistry 9 Flashcards
Atomic theory by John Dalton?
Matter is composed from atoms, identical in mass and size of other elements
Atomic theory by J.J Thompson?
Raisin bun model:
Charged bun positive
Raisins negative, eventually found out its called electrons
Atomic theory from Ernest Rutherford?
Dense center called nucleus and electrons moved around it
Atomic theory of Neils Bohr?
Electrons surrounding the nucleus in energy levels or shells
What makes up most of size of an atom?
The valence shell and electrons
What makes up most of mass of an atom?
Protons and neutrons
What are the horizontal rows in the periodic table called?
Periods
What are the vertical columns in the periodic table called?
Families
Name each families in the periodic table, their charge and if it loses or gains electrons
Alkali metals, + , loses electron
Alkali earth metals, 2+ , loses 2 electrons
Halogens, - , gains electron
Noble gases, neutral, neutral
Differences between Metals and Non metals
Metals: give away electrons to form positive ions, conductors
Non metals: gain electrons to form negative ions, inductors
What are metalloids and where are they found in the periodic table
Metalloids are both metal and non metal and found around the staircase
Difference between chemical change and physical change
Chemical change: new compounds formula made from heat
Physical change, changes of state
Two chemical bonds and how are they formed?
Ionic bond: metal to non metal
Covalent bond: non metal to nonmetal
What is a chemical reaction
When the chemicals react to form new elements
