Answer:
ELEMENTS MIXTURE
Elements are made up of one kind of atoms. Mixtures are made up of two or more kinds of Compounds .
Elements cannot be broken down into simpler substances by any physical or chemical method. The various constituents are seperated by simple physical means
Answer:
Air is a mixture, and the image shows that it is composed of different amounts of the same several pure substances.
Explanation:
water, O2, and carbon dioxide (all mixtures) are made of pure substances like hydrogen, oxygen, and carbon.
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Answer:
F
EXPLANATION
Among the given elements fluorine(F)can not lose electrons easily because of its high electron affinity, high nuclear charge and high electronegativity.
Answer:
3. 0.75 mole. or (C)
Explanation:
1.5 moles. 9.03X1023 . 3. 0.75 mole. 4581023. 4. 15 moles.
Answer:
Only columns
Step-by-step explanation:
The properties of elements vary as you go across a period or down a column.
However, the properties are most similar as you go down a column.
That's because all the elements in a column have the same number of valence electrons.
For example, they may all want to gain one electron, so they will all form the same types of compounds.
The valence electrons determine the chemical properties, so the elements in the same column have the most similar properties.