Answer : Option 2) Nonmetallic properties and ionization energy
Explanation : It is observed that the nonmetallic properties and the ionization energy when the elements in period 3 on the periodic table are considered in order from left to right.
Various changes are observed when we move from left to right in period 3 in the modern periodic table like the atomic number and charge on the nucleus increases
, number of valence electrons increases
, atomic radius decreases
, first ionization energy increases
, electro negativity increases except in Ar, elements found on the left are metals and elements on the right are non-metals, so non metallic character increases.
1. False
2. False
3. True
4. True
5. True
1st question: A mixture is when the components of a mixture can be easily separated and that the components each keep their original properties.
2nd question:A phase is any part of a sample that has a uniform composition and properties.By definition, a pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers.
Heterogeneous mixtures are not uniform in composition. Examples would be wood or blood. Homogeneous mixtures are uniform through out. Typically you can see through them.
Answer:
2.51 x 1023 atoms C
Explanation:
MW C = 12.011
5g x (1mol/12.011g) =0.416 mol
0.416 mol x (6.022x10^23) = 2.51 x 1023 atoms C
I believe your answer is: What is the enthalpy of formation of magnesium oxide?
Hope this helps! :)
