1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
uranmaximum [27]
3 years ago
9

The rare earth elements include A. the lanthanide series and the alkali metals. B. the alkali metals and the transition metals.

C. the actinide series and the alkaline earth metals. D. the lanthanide series and the actinide series
Chemistry
2 answers:
Novay_Z [31]3 years ago
8 0
<span>The rare earth elements include the lanthanide series, scandium and yttrium. They are a set of seventeen chemical elements in the periodic table. They really are not that rare but they occur together in nature and are hard to separate from one another.</span>
amid [387]3 years ago
8 0
D. The Lanthanide Series and the Actinide series.
You might be interested in
A sample of a substance has a mass of 4.2 grams and a volume of 6 milliliters
allsm [11]

Answer:

Density of the substance is 0.7

Explanation:

4.2/6 = 0.7

6 0
3 years ago
Read 2 more answers
Carbon dioxide is formed when two oxygen atoms chemically combine with a carbon atom. Which term best describes carbon dioxide?.
Katarina [22]
Carbon Dioxide is formed when two oxygen atoms chemically combine with a carbon atom. The term that will best describe carbon dioxide is a compound. That will make the correct answer D. 
3 0
3 years ago
Read 2 more answers
True or false. (Pls help)
grigory [225]
I believe they’re both true.
5 0
2 years ago
Read 2 more answers
which of the following requires the most energy to break a bond? a. breaking cl-br bond. b. breaking a n-p bond. c. breaking a o
irina1246 [14]

A. Breaking a Cl-Br bond

6 0
2 years ago
G what is the difference between the sidechains of leucine and isoleucine? select one:
statuscvo [17]

c. Isoleucine has a carbon “branched” closer to the alpha carbon than does leucine.

The structure of leucine is CH3CH(<u>CH3</u>)CH2CH(NH2)COOH.

The structure of isoleucine is CH3CH2CH(<u>CH3</u>)CH(NH2)COOH.

In leucine, the CH3 group is <em>two carbons away</em> <em>from</em> the α carbon; in isoleucine, the CH3 group is on the carbon <em>next to</em> the α carbon.

Thus, <em>isoleucine</em> has the closer branched carbon.

“One is charged, the other is not” is i<em>ncorrect</em>. Both compounds are uncharged.

“One has more H-bond acceptors than the other” is <em>incorrect</em>. Each acid has two H-bond acceptors — the N in the amino and the O in the carbonyl group.

“They have different numbers of carbon atoms” is <em>incorrec</em>t. They each contain six carbon atoms.

4 0
3 years ago
Other questions:
  • At elevated temperatures, methylisonitrile (CH3NC) isomerizes to acetonitrile (CH3CN): CH3NC (g) → CH3CN (g) At the start of the
    10·1 answer
  • Help me on number 4 and that last one says blood pressure
    10·1 answer
  • 3CuCl2 + 2Al = 2AlCl3 + 3Cu using the molar ratio between the limiting reactant (aluminum) and the product copper, determine the
    9·1 answer
  • What is the wavelength of electromagnetic radiation having a frequency of 5.00 x 10^12 Hz?
    10·1 answer
  • Consider the following reaction where Kc = 6.50×10-3 at 298 K: 2NOBr(g) 2NO(g) + Br2(g) A reaction mixture was found to contain
    10·1 answer
  • Energy is used to combine amino acid building blocks in order to build a large protein. What type of reaction is this?
    13·1 answer
  • calculate the standard potential arising from the reaction in which NADH is oxidized to NAD and the corresponding biological sta
    5·1 answer
  • A spring toy is moving down steps, What happens to the energy of the toy?
    7·1 answer
  • Consider the role of third world countries in this system. How would they benefit or not benefit from a cap and trade system?
    12·1 answer
  • In which layer of the atmosphere can you find meteors?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!