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
julia-pushkina [17]
3 years ago
7

The periodic table below shows which elements are metals, nonmetals, and metalloids. the element with the chemical symbol ______

_ is a nonmetal.
a. al
b. na
c. h
d. k
Chemistry
1 answer:
aleksandr82 [10.1K]3 years ago
8 0
H.
represents hydrogen element. under non metal classification.

for others, you'll find them under metal element classification.
You might be interested in
What is the difference in chemical energy between organic and inorganic materials?
Dahasolnce [82]

Answer:

the difference is  the presence of a carbon atom

Explanation:

5 0
3 years ago
The radioactive isotope 210/84 Po decays by alpha emission.
yan [13]

The half-life of polonium-210, given that it decays from 98.3 micrograms to 12.3 micrograms in 414 days is 138 days

<h3>How to determine the number of half-lives </h3>
  • Original amount (N₀) = 98.3 micrograms
  • Amount remaining (N) = 12.3 micrograms
  • Number of half-lives (n) =?

2ⁿ = N₀ / N

2ⁿ = 98.3 / 12.3

2ⁿ = 8

2ⁿ = 2³

n = 3

<h3>How to determine the half life </h3>
  • Number of half-lives (n) = 3
  • Time (t) = 414 days
  • Half-life (t½) = ?

t½ = t / n

t½ = 414 / 3

t½ = 138 days

Learn more about half life:

brainly.com/question/26374513

#SPJ1

4 0
2 years ago
Read 2 more answers
Write a balanced chemical equation based on the following description: aqueous potassium phosphate reacts with aqueous nickel(II
Sunny_sXe [5.5K]

Answer:

2 K3(PO4) aq  + 3NiBr2 aq  -------- 6 KBr  aq +  Ni3(PO4)2  s

Explanation:

8 0
3 years ago
) Predict the product for the following reaction sequence. A) 2,2-dimethylpropanoic acid B) 3,3-dimethyl-2-butanone C) 2,2-dimet
cestrela7 [59]

Answer:

Option C. 2,2-dimethyl-1-propanol

Explanation:

The first attached picture, is the initial reactant.

Now, what happens in each step?, at first we have an alkyl bromide reacting with Mg/ether. This converts the reactant in a grignard reagent, which is often used in several ketones/ladehydes reactions, and even some acid and esthers.

Now, in the second step, we see this grignard reagent, reacting with CO₂ and H₃O⁺. At first, the grignard reagent will attach to the oxygen of the CO₂ by the MgBr, and the carbonated chain will attach to the carbonile. Then in acid medium, the OMGBr leaves the molecule, and form a carboxylic acid.

Finally, in the last step with LiAlH₄ and water, this compound just reduces the carboxylic acid to a primary alcohol, therefore, the only choice available is option c, 2,2-dimethyl-1-propanol.

See picture 2 below for the drawing.

Hope this helps

8 0
3 years ago
Please help answering 46)
OLga [1]

Answer:

CO2 is a trigonal planar.

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the defining characteristic of an exothermic reaction.
    5·1 answer
  • A car with a 20-gallon gas tank can go 25 miles on 1 gallon
    5·2 answers
  • Which of the following situations indicates an alpha emission?
    11·1 answer
  • Which energy position do electrons generally want to be in?
    14·1 answer
  • Look at the two containers of water and their starting conditions shown above.
    15·2 answers
  • How does water change the shape of Earth's surface?
    13·2 answers
  • A gas has a volume of 250.0 liters at 17.0 °C and 3.00 atm of pressure. what volume must the gas be increased for the gas to be
    15·1 answer
  • Helppppp i have inorganic chemistry exammm​
    6·1 answer
  • How many chiral carbons does the molecule have?
    15·1 answer
  • Use VSEPR theory to predict the molecular
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!