How many neutrons are probably in the nucleus of an element of atomic weight 197?

a. 43

b. 79

c. 83

d. 100

e. 118

The best electrical conductor is: a. 0.10 M NH₃ b. 0.10 M NaCl c. 0.10 M HC₂H₃O₂ (acetic acid) d. 0.10 M C₂H₅OH (ethanol)

How many moles of oxygen (O) atoms are in a sample of 3.98 x 10^23 atoms?

What is the reaction that joins thousands of small, identical molecules to form one very long molecule?

Why are enzymes required for living things to function?

Which is a substance fruit salad granola cereal spaghetti or table salt

Where did the earth hold most of its original water

Giovanni created this chart to study for an exam. A 2-column table titled common ionic compounds. The first column labeled compound has entries sodium hydroxide (N a O H), iron oxide (F e O), calcium chloride (C a C l subscript 2), calcium carbonate

Consider the two electron arrangements for neutral atoms A and B. What is the difference between atom A and atom B? A - 1s22s22p63s1 B - 1s22s22p65s1 Atom B has lost some inner electrons.

Choose all the answers that apply. Which of the following has kinetic energy? rolling ball, moving car, book on a table, spinning top, or a falling tree.

Which of the following statements about the suns feature is true?