Match each fossil with the layer where it’ll be present based on these conditions: Dinosaurs existed before birds. Corals existed between trilobites and amphibians. Trilobites are the oldest fossils. Dinosaurs are younger than amphibians. Birds are the youngest species to be observed in this stratum. Layer A is the top layer. corals trilobites dinosaurs birds amphibians layer A arrowRight layer B arrowRight layer C arrowRight layer D arrowRight layer E arrowRight
What is the second quantum number of a 1s2 electron in phosphorus, 1s22s22p63s23p3?
What type of chemical reaction absorves energy and requires energy for the reaction to occur? A)Endothermic B)Exothermic C)Synithis D)Both A and B
Diagonal relationship is present between the lighter elements of periods
1) Second, third 2) Second, fourth 3) Third, fourth
4) third, fifth
Generally the ionization potential in a period increases, but there are some exceptions. The one which is not an exception is
1) Be & B 2) N & O 3) Mg & Al 4) Na & Mg
a) Write the word equation for a neutralisation reaction between an acid and an alkali.
What kind of intermolecular forces between an ammonia molecule and a water molecule? Note: there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force
How many grams of Hydrogen will be created from 5 moles of Aluminum? 2 Al + 3 H2SO4 – Al2(SO4)3 + 3H2
What would be the observation when pineapple juice is dipped in a red litmus paper
what would be the observation when you dipp magnesium hydroxide in a blue litmus paper and a red litmus paper. also what would be the conclusion for it