Answer:
Covalent compounds don't contain ions because they make bonds by sharing electrons. In addition, they don't have any charge carries that are free to move so they can't carry electric current
Explanation:
Answer:
The wood
Explanation:
The block of wood shall float in the water while the iron key would sink due to the weight.
Given that in the alien planet the names of substances and the units in which they are measured in not familiar.
8 quibs of a substance called skvarnik is present.
The conversion factor between sleps and quibs is: 9 sleps = 13 quibs
Converting 8 quibs of skvarnick to sleps:
5.54 when rounded to nearest tenth becomes 5.5.
So the correct answer would be 5.5
Answer:
13 elements
Explanation:
those 13 elements involve Xenon,Radon,Chlorine,Hydrogen,Helium,Nitrogen,Krypton,Neon,Fluorine,Oxygen,Argon.Most of them are non-metals.
Dalton postulated that atoms of the same elements had the same mass while atoms of different elements had different masses.
The discovery of isotopes revealed that atoms of the same element did not necessarily have same masses, they could have different masses.
Therefore, the modern periodic table that we use nowadays contains the average atomic mass of all the isotopes found for a given element.
