Explain why there is a greater increase in effective nuclear charge from left to right across a period than there is for top to bottom in a group.

In the equation for specific heat capacity, temperature is measured using the units degrees

How is a pure substance different from a mixture? A. Pure substances cannot be separated by physical means. B. Mixtures cannot be separated by physical means. C. A pure substance is heterogeneous. D. A mixture is made of one substance.

Which describes why the magma moves in the direction of the arrows? O The magma is cooled and becomes more dense by the core moving it toward the crust. The magma is heated and becomes more dense by the core moving it toward the crust.

A skeleton equation shows just the reactants and products whereas a balanced equation shows the

What type of molecule is the molecule seen below? ch3-ch2-ch2-ch2 protein nucleic acid sugar lipid hydrocarbon?

Before oceanography was recognized as its own branch of science it was part of A. Physics B. Chemistry C. Geometry D. Natural science

For a chemical reaction to be spontaneous at all temperatures, which of the following conditions must be met? a. ΔS° > 0, ΔH° > 0 b. ΔS° > 0, ΔH° < 0 c. ΔS° < 0, ΔH° < 0 d. ΔS° 0 e.

What is a Binary Compound? Is it related to the Ionic and Molecular compounds? if so, how so?

Which answer correctly describes the difference between covalent and ionic bonds? A. ionic: transfer of protons covalent: transfer of electrons B. ionic: transfer of electrons covalent: transfer of protons C.

What are the first five elementsof the periodic table?