This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following pairs are isotopes? A) Ca2+ and Mg2+ B) 199Hg and 200Hg C) 18O and 19F ... (Read 30 times)

tnt_battle

  • Hero Member
  • *****
  • Posts: 556
on: Aug 27, 2018
Which of the following pairs are isotopes?
 
  A) Ca2+ and Mg2+
  B) 199Hg and 200Hg
  C) 18O and 19F
  D) 238U and 238Np

Question 2

Fr+ is called ________.
 
  A) a cation
  B) an anion
  C) an isotope
  D) a non-metal

Question 3

Water consumption from all aquifers, on average, is less than the amount of water returned to the aquifer by natural processes. Why should we worry about water use?
 
  A) The average amount does not reflect that drier areas have a harder time refilling the aquifers.
  B) Because the water returned is contaminated.
  C) The average amount does not take into account the water consumed during photosynthesis to make carbohydrates.
  D) Water is nothing to worry about.
  E) none of the above


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

irishcancer18

  • Sr. Member
  • ****
  • Posts: 310
Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

A

Answer to Question 3

A


tnt_battle

  • Member
  • Posts: 556
Reply 2 on: Aug 27, 2018
YES! Correct, THANKS for helping me on my review

nyrave

  • Member
  • Posts: 344
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

The 31 pairs of spinal nerves. The 31 pairs of spinal nerves.
Conjugate acid-base pairs consist of a proton donor and a proton acceptor Conjugate acid-base pairs consist of a proton donor and a proton acceptor
A typical bus system showing module CAN communications and twisted pairs of wire. A typical bus system showing module CAN communications and twisted pairs of wire.
Two different pairs of chromosomes Two different pairs of chromosomes
Ball-and-stick models of A=T and G≡C base pairs Ball-and-stick models of A=T and G≡C base pairs
Comparison of two pairs of rII mutations Comparison of two pairs of rII mutations
Video: Optic Nerve and Optic Disk Animation (Part 2 of 2)

For a complete list of videos, visit our video library