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What are abiotic and biotic factors in an ecosystem
Abiotic = non-living
Biotic = living things
What is an ecosystem?
A system formed by a group of living things interacting with their non living surroundings
What are the three main types of symbiotic relationships?
Mutualism - two organisms live closely and both benefit
Parasitism - one wins the other loses
Commensalism - benefits one but neutral for the other
What are examples if the three types of symbiotic relationships?
…
All atoms of the same elements have the same number of protons. This is known as the atomic number.
true or false?
True
If there is the same amount of protons and electrons then the charge of the atom is…
Neutral
Most of an aroma mass is in…
The nucleus
Which subatomic particle determines the atomic number?
Protons
What are the electron configurations for the first four sections of an atom?
2,8,8,2
What is a valence electron?
The outermost election of an atom
What is a compound?
A compound is a substance containing atoms of two or more elements joined together be chemical bonds.
What are periods and groups on the periodic table?
The periods are the horizontal rows and the groups are the vertical columns.
What is an ion?
A neutral atom that gains or losses electrons
Who created the periodic table of elements
Dmitri Mendeleev
The elements are ordered in what?
Atomic number
What is an element?
Elements are pure substances which are composed of only one type of atom.
What is a compound?
Compounds are substances which are formed by two or more different types of elements that are chemically bonded.
What are the delocalised electrons in a metal lattice?
They are the electrons that move freely from atom to atom
What is metallic bonding?
A lattice of metal atoms held together by the “sea of electrons”
What is an ion?
An ion is an atom or group of atoms that has an electric charge.
What are the two types of ions and what do they mean
Cations - are positively charged ions, formed by the loss of electrons
Anions - are negatively charged ions, formed by the gain of electrons
Ionic bonds are formed by..
Transfer of electrons
What is the equation of a Quadrat
No. Of individual counted OVER (no. Of quadrats) x area of quadrar
Random!! What does the acronym MAIN stand for in ww1
Militarism, alliances, imperialism, nationalism
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