Science 10 Flashcards
(26 cards)
Valence Energy Level
The outer most shell or energy level of an atom
What’s number of dots are shown on the rings and what’s the order of them to
Protons found in electrons.
2
8
8
What’s the Bohr Model
A model showing iner and valence layers of an atom with the number or protons and neutrons written in the middle
North-west dots are placed around rings
Rings are 2
8
8
What’s the Lewis Dot model
Valence layer only
Max protons 8
No rings
Only the element written in the middle
What’s a Cation
Cat= positive because cats are cute
Gain of e can be found in a periodic table
What’s a anion
Anion= onion
Onions are négative because they are bitter
What is a ion
A charged version of an atom
How is the number of electrons gained or lost determined
You have to get rid of the ion
Example: bi2+ =2e-
Pure substance
substances that are made up of only one kind of particle and have a fixed or constant structure.
Mixtures
More than 1 kind of pure substance
Compound
Combined chemicaly
Element
pure substances that cannot be broken down further by physical means
Heterogeneous
Has distinct parts easy to separate
Homogeneous
Homo=same
Unable to physically distinct parts
What’s the 2 groups Pure substance are put into
Compounds and elements
What’s are they 2 groups mixture are put into
Heterogeneous and homogeneous
Ionic compounds
ionic compounds are composed of positive and negative ions held together by ionic bonds
Molecular compounds
molecular compounds are compounds made up of nonmetals covalently bonded to each other.
Physical properties
Appearance
Size
Shape
Color
State
Chemical properties
Tarnish, rust, odur,
Lustre
A shine reflecting off a surface
Ductility
Can be Manipulated for example into wires
Malleability
Can be rolled easy
Exothermic
Gives off heat and releases energy to its surroundings
Example fire or explosions
