Describe the role of energy in chemical reactions.
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4. How many protons are there in this atom?5. How many neutrons are there in this atom? 6. How many electrons are there in this atom? 7. What is the atomic weight of this atom? 8. Does the mass on the periodic table round to the mass this atom has? 9. What atom is this? 9p+ 10 n° 10. For each electron shown, write on the diagram to indicate which orbital (1s, 2s, 2p,...) each electron is in. 11. Draw the orbital filling diagram for this atom. (Orbital filling is the thing with the boxes and the arrows). 12. Write the electron configuration (1s"2s*) for this atom.
sunlight
rain
bacteria
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Answer:
The correct answer is option d: bacteria
Explanation:
Hello! Let's solve this!
Abiotic components are those that have no life and biotics are the factors that have life.
Let's see each option!
Nutrients: they have no life, they can be calcium, protasium, vitamins
sunlight: it has no life, it comes from the sun
rain: it has no life, it is condensed water and it falls to the earth in the form of drops
bacteria: they have life, they are cells so they are living beings.
We conclude that the correct answer is option d: bacteria
Test the niobium sample for the presence of niobium oxide compounds.
Heat the niobium, and see if the level of radioactivity in the lab increases.
Place the niobium under pressure, and see if the level of radioactivity in the lab increases.
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The 2nd choice doesn't work because niobium oxides aren't radioactive (unless the niobium itself was radioactive, but you can't tell with this method).
The last 2 choices don't work because temperature and pressure don't affect the rate of decay.
A scientist can assess whether a pure niobium (Nb) sample is responsible for contaminating the lab with radioactivity by A. Testing the niobium sample to see whether it now contains other elements.
What is radioactivity?
It should be noted that radioactivity simply means the natural process through which atoms disintegrate.
In this case, the scientist can assess whether a pure niobium (Nb) sample is responsible for contaminating the lab with radioactivity by testing the niobium sample to see whether it now contains other elements.
Learn more about radiation on:
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B) The box's velocity will be 1 m/s.
C) The box's velocity will not change.
D) The box will experience acceleration.
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Answer: Option (D) is the correct answer.
Explanation:
The rate of change in velocity over change in time is defined as acceleration.
Mathematically, Acceleration =
where = change in velocity
= change in time
Therefore, when a force of 2 N to the left and 3 N to the right then box will experience acceleration as velocity is also changing with time.
Thus, we can conclude that a box experiences a force of 2 N to the left and 3 N to the right then it is true that the box will experience acceleration.
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Hydrogen(7)
Nitrogen(1)
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If enough heat was REMOVED from B, it would change into A.
An exothermic reaction is a reaction that releases energy, this energy is usually in the form of heat. An endothermic reaction is a reaction that absorbs energy to take place.
To bring molecules together requires the release of energy, that is, an exothermic reaction.
Thus, if heat were removed from B, it would turn into A, with molecules closer together, in the solid state.
Learn more about exothermic reaction in: brainly.com/question/14969584
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1 Cu + 2 AgNO₃ -> 1 Cu (NO₃)₂ +2 Ag
63,546 -------- 2 * 169.87
? g Cu ------- 45.0
Mass ( Cu ) = 45.0 * 63,546 / 2 * 169.87
Mass ( Cu ) = 2859,57 / 339,74
Mass = 8.4169 g of Cu
hope this helps!