Mendeleev i ordered it the well-known chemical facets in a table follow to enhancing mass.
You are watching: A member of the boron family has three valence electrons while a member of the nitrogen family has
Atomic mass unit.
One twelfth the mass of a carbon-12 atom is offered to specify an atomic mass unitExplanation;An atomic mass unit (AMU) ad to precisely 1/12 the fixed of an atom of carbon-12. The carbon-12 atom has six protons and six neutron in the nucleus. One AMU is the mean of the proton rest mass and also the neutron rest mass.The mass of an atom in atom mass unit is around equal come the amount of the variety of protons and neutrons in the nucleus.The atomic mass unit expresses the relative masses of various isotopes that elements. 3. Answer;
A member of the boron household has three valence electrons, while a member the the nitrogen household has five electrons.Explanation;The variety of valence electrons is the number of electrons in the outermost energy level of an atom. Nitrogen family includes, non-metals, metalloids, and also metals. The atoms of these facets in the nitrogen family members have a 5 valence electrons. The family incorporate elements, phosphorus, bismuth, arsenic and antimony. They form bonds with sharing that electrons.4. Answer;
Li2OExplanation;Ionic compounds room compounds the are consisted of of ions. Castle are formed as a an outcome of transport of electron from one atom come another. One atom loses electrons while the various other atom benefit electrons, resulting to development of negatively fee ion (anion) and also positively charged ion (cation) which sign up with via ionic link to form an ionic compound.Lithium oxide is an instance of ionic compound developed from lithium and oxygen atoms. Lithium has actually a valency of one while oxygen has a valency the two, therefore, the chemical formula the lithium oxide will certainly be Li2O. 5. Answer;
Of the strong attractions between polar water molecules
Water has a higher boiling point than expected because of the solid attractions in between polar molecules.
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