S1-Why do atoms combine ( (Electrons exist in an area called the…
S1-Why do atoms combine
Electrons exist in an area called the electron cloud.
Electrons have negative charge.
The number of electrons is equal to the atomic number.
At the center of the atom is the nucleus.
The different regions for an electron in an atom are called energy levels.
Each energy level can hold a maximum number of electons
The number of electrons in a neutral atom increases by one from left to right across a period.
Electron traveling around the nucleus.
The amount of proton is same as protons.
The outer energy level,responsible for physical and chemical properties of element .
The atomic number increase from left to right.
Atoms with the complete outer energy level are stable.
Element are divide into groups.
Element in the same group share similar properties
Energy level 1-two or one elements
Energy level 2-eight electrons
Energy level 3-18 electrons
Energy level-32 electrons
Mendeleev noticed that elements have repeating patterns
Noble gases are stable that is why they don't combine easily.
Florine is a reactive halogen.
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