Copper occurs in nature in the form of two isotopes, Cu-63 and Cu-65. Its correctly recorded atomic mass (weighted average) is 63.5 amu. Without doing the math, explain why it is safe to say that Cu-63 is more abundant than Cu-65.

What is a scientific claim

Which of the following is an example of an organism that reproduces through mitosis? A. human B. tarantula C. sunflower D. bacterium

Look at the chemical formula for glucose, how many carbon C, hydrogen H, and oxygen O, atoms are found in a molecule of glucose?

What are pioneer species? a. Species which are the first to colonize previously biodiverse ecosystems. b. The last species to appear in an area after a disturbance. c. Only species that live in a climax forest. d. None of these answers are correct.

What nuclei are fused in the nuclear reaction of a hydrogen bomb?

What does the velocity of a wave describe

Sulfur (S) has 16 protons and 16 neutrons. How many electron shells does an element of sulfur have?

Which one of the following statements about orbital energies is incorrect? A) The energy of a given orbital increases as the nuclear charge Z increases. B) In many-electron atoms the energy of an orbital depends on both n and l.

When solid lead (II) sulfide ore burns in oxygen gas, the products are solid lead (II) oxide and sulfur dioxide gas.? A. write the balanced equation B. how many grams of oxygen are required to react with 29.9 grams of lead II sulfide? C.

What are some differences between insect larvae and worms?