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
DedPeter [7]
2 years ago
14

Which of these elements is a metal? Hafnium Radon Silicon Sulfur Selenium

Chemistry
2 answers:
Gre4nikov [31]2 years ago
6 0
Selenium is a non metal, radon is a noble gas, silicon is a metalloid, and sulphur is a non metal. Hafnium is a transition metal.
natali 33 [55]2 years ago
6 0

Answer:

Hafnium

Explanation:

Hafnium is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals

You might be interested in
Which profile best describes the reaction C(s) + 2H2(g) → CH4(g),<br> AH = -74.9 kJ?
katrin [286]

Answer:

Option B. A

Explanation:

From the question given above, the following data were obtained:

C(s) + 2H₂ (g) —> CH₄ (g). ΔH = –74.9 kJ

From the reaction above, we can see that the enthalpy change (ΔH) is negative (i.e –74.9 KJ) which implies that the heat content of the reactants is greater than the heat content of the products. Thus, the reaction is exothermic reaction.

For an exothermic reaction, the energy profile diagram is drawn in such a way that the heat content of reactants is higher than the heat content of products because the enthalpy change

(ΔH) is always negative.

Thus, diagram A (i.e option B) gives the correct answer to the question.

8 0
2 years ago
Read 2 more answers
Which food is mainly made up of carbohydrates?
Alenkasestr [34]
Bread is the answer you are looking for please mark as brainliest! :)
6 0
3 years ago
In the biosphere, prey represent a food source for predators. An increase in the population of prey means more food for predator
mote1985 [20]
<h2>Answer:</h2>

An increase in the population of prey means more food for predators, which will<u> increase</u> the predators' population. As a result, many more prey will be hunted, causing the prey population to<u> decrease.</u> In response, the predator population will <u>decrease</u>, resulting in an increase in the prey population.

<h3>Explanation:</h3>

The feedback loop is control of the system containing the prey and predator.

In this loop, the population of predator is directly proportional to prey but the population of prey is inversely proportional to a predators population.

As the population of prey increases, the population size of predator becomes large due to the availability of food. This inversely decreases the population of prey, as the predator do more hunt.

So the decrease in prey population results in a decrease in the predator population.

5 0
3 years ago
Read 2 more answers
The phosphorylation of fructose 6-phosphate to fructose-1,6-bisphosphate is the committed step in glycolysis because?.
Daniel [21]

The phosphorylation of fructose 6-phosphate to fructose-1,6-bisphosphate is the committed step in glycolysis because. it is the rate-limiting step

<h3>What is phosphorylation?</h3>

The first step in the metabolism of carbohydrates is frequently their phosphorylation. Because the phosphate group stops the molecules from migrating back across the transporter, phosphorylation enables cells to store carbohydrates. Glucose phosphorylation is a crucial step in the metabolism of sugar. In the first phase of glycolysis, D-glucose is converted to D-glucose-6-phosphate using the chemical equation D-glucose + ATP D-glucose-6-phosphate + ADP G° = 16.7 kJ/mol (° signifies measurement under standard conditions).

The rate-limiting stage in the liver's metabolism of glucose is the initial rate of phosphorylation of glucose (ATP-D-glucose 6-phosphotransferase) and non-specific hexokinase. Hepatic cells are freely permeable to glucose (ATP-D-hexose 6-phosphotransferase).

encouraging certain glucose transporters to translocate to the cell membrane.

To learn more about phosphorylation from the given link:

brainly.com/question/2138188

#SPJ4

7 0
1 year ago
How do minerals form?
borishaifa [10]
Minerals form by erosion of rocks.The erosion process includes water and other rocks rubbing against other rocks.
8 0
2 years ago
Other questions:
  • E85 fuel is a mixture of 85% ethanol and 15% gasoline by volume. What mass in kilograms of E85 (d = 0.758 g/mL) can be contained
    7·2 answers
  • In redox half-reactions, a more positive standard reduction potential means I. the oxidized form has a higher affinity for elect
    8·1 answer
  • Hydrogen bonds form between adjacent water molecules because the
    6·1 answer
  • Balance the chemical equation given below, and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is
    5·1 answer
  • When ironing clothes, the primary method of heat transfer is A) conduction. B) convection. C) insulation. D) radiation.
    11·2 answers
  • Is barium nitrate more soluble in water than CH4 or the other way around?
    11·1 answer
  • How many times does the Moon rotate on its axis during a lunar month?
    12·1 answer
  • If the same index fossils are found in different rock strate miles apart, what is probably true about the rock layers?
    12·1 answer
  • Only animals and not plants can adapt to their environment true or false
    14·1 answer
  • Need help with 22 and 24<br>​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!