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Why are electrons from different elements different?
All the electrons in all chemical elements are identical; only the numb er is different.
Why are all elements all different?
They all have different amounts of protons in the nucleus, different properties, and no two things can be identical.
How are two atoms of the same elements alike?
They have all the chemical, physical, nuclear properties identical. This is not the case for isotopes.
What is the column of elements in the periodic table that have similar but not identical properties?
A group of elements.
What is a compound of two identical elements known as?
A compound can only consistent of at least two different elements.
What are equal and equivalent sets?
Equal sets contain identical elements. e.g. if A = {1,2,3} and B = {1,2,3}, then A and B are equal - their elements are the same. Equivalent sets have identical numbers of elements. e.g. if A = {1,2,3} and B = {a,b,c}, then A and B are equivalent - they both have three elements.
How many chemical properties does isotopes have?
All the isotopes of a chemical element are identical; some differences exist for light elements (ex. H or D).
What are two ancient greek theories of matter?
Dalton's Atomic theory: all elements contain tiny atoms, that's the only way an element is pure because al atoms of an element were identical and it also explains the identical masses
Why don't the elements within group A in the periodic table have identical properties?
Elements in group A are metals. They possess metallic behaviour.
Why don't the elements within in a group in the periodic table have identical properties?
Elements in group A are metals. They possess metallic behaviour.
Are elements materials made of two or more types of atom?
If we don't consider the isotopes chemical elements have identical atoms.
Why don't the elements within a group in the periodic table have identical properties?
Elements in group A are metals. They possess metallic behaviour.
