Answer:
Explanation:
D. Se2−
Selenium is in Group 16 of the periodic table, and it typically has 6 valence electrons. To achieve a stable set of valence electrons, it will either try to gain two more electrons to form Se²⁻or lose six electrons to form Se⁶⁺. Therefore, the correct option is option D.
An ion is an atom or a molecule that has gained or lost one or more electrons, resulting in an unequal number of protons and electrons. When an atom gains electrons, it becomes negatively charged and is called an anion. Conversely, when an atom loses electrons, it becomes positively charged and is called a cation.
Ions play a crucial role in chemical reactions and the formation of chemical compounds, as they are attracted to one another based on their opposite charges. This process helps stabilize the electron configuration and achieve a more stable, lower-energy state.
Thus, the ideal selection is option D.
Learn more about Ions, here:
https://brainly.com/question/30663970
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What is an organelle?
A. the basic building block of living things; the smallest piece of every organism that has all of the characteristics of a living
thing and can perform all life functions
B. one small part in or around a cell that has a very specialized job or function
C. structure, such as a heart or a leaf, made up of different types of tissues that all work together.
D. the smallest unit of an element that can be considered that element; they make up all matter
Answer:
A
Explanation:
The basic building block of living things; the smallest piece of every organism that has all of the characteristics of a living thing and can perform all life functions, An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body.
I will give 10 points
Answer:
platlets
Explanation:
hope it helps.......
need help i dont get this
Answer:
Speed
Explanation:
Because That's how fast the Car is traveling.
Help with chemistry question. Look at image.
Answer:
It is called the periodic table because of the way he elements are arranged. You'll notice they're in row and columns. The horizontal rows are called periods and the vertical columns are called groups. (so I believe it's A or C) sorry if I get this wrong..
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Use the periodic table to help you answer this question.
Give the full electron configuration for aluminum.
Answer:
the answer is 1s22s22p63s23p1
200 cm is equal to how many meters?
what type of orbital would the electrons in a tungsten atom have
Answer:
It would have 74 valence electrons
Water and octanol are immiscible. This means that if you add them together, they will not mix, blend, or form a solution. Thus, when you pour them both in a beaker, you will see two separate layers. If you pour octanol (density = 0.824 g/mL) and water (density = 1.00 g/mL) into the same beaker, which layer will be on the bottom? Why?
Which model uses nuclear fusion Thomason model or the Bohr model (it’s the second bullet point)
Answer:
Aye bro you from discovery too
Explanation:
Explain why you can not use a physical reaction to separate elements that are chemically bonded together
1)state Non-Mendillian's Law of Inheritance.
2)What are the two alleles for flower color in snapdragon?
Answer:
These questions are not chemistry darling. You have chosen the wrong subject
Kendrick goes to his neighborhood gym to exercise. The process of cellular respiration makes it possible for him to run on the treadmill and to lift weights. What do Kendrick's cells do during cellular respiration?
His cells convert kinetic energy into chemical energy.
His cells use oxygen to break down food molecules to release energy.
His cells absorb light energy through the chlorophyll in their chloroplasts.
His cells combine water and carbon dioxide to produce oxygen and glucose.
Answer: His cells use oxygen to break down food molecules to release energy
Explanation:
Answer:B
Explanation:
which state of matter is more dense?
solids have more dens than any type of matter and I am sure btw
Answer:
Gas - Liquid - SolidExplanation:
If you are asking which state of matter is more dense of which, then this is the order.
- Liquid is more dense than Gas
- Solid is more dense than Liquid
- Gas is less dense than Air
Just to let you know, Solid is the most dense of them all, making Gas the least dense of the three.
Hope this helps! ^^
What kind of bond is made up of shared electrons?
A. A covalent bond
B. An ionic bond
C. A hydrogen bond
D. An electrostatic bond
Answer:
A. A covalent bond.
Need a longer answer...
a covalent bond
AP ex
Select all that apply.
How would you compare Venus's rotation to Earth's rotation?
Venus's rotation is backward compared to Earth's.
Venus's rotation is the opposite compared to Earth's.
Venus's rotation is retrograde compared to Earth's.
Venus's rotation is the same compared to Earth's.
Answer:
Venus's rotation is retrograde compared to Earth's.
Explanation:
Firstly its axis of rotation is inclined at 177.36 degrees (compared to 23.5 degrees on Earth). This means that Venus rotates in a retrograde direction from east to west, making the Sun rise in the west and set in the east. Further to this the rotation is very slow: a sidereal day on Venus lasts 243 Earth days.
What is the mass in grams of 14.2 liters of sulfur dioxide gas at STP?
Answer:
Mass = 40.4 g
Explanation:
Given data:
Mass in gram = ?
Volume of SO₂ = 14.2 L
Temperature = standard = 273 K
Pressure = standard = 1 atm
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
1 atm × 14.2 L = n × 0.0821 atm.L/ mol.K × 273 K
14.2 atm.L = n × 22.41 atm.L/ mol
n = 14.2 atm.L/22.41 atm.L/ mol
n = 0.63 mol
Mass of sulfur dioxide:
Mass = number of moles × molar mass
Mass = 0.63 mol × 64.1 g/mol
Mass = 40.4 g
Which statement best describes scientific laws? A) Scientific laws are scientists' opinions of why events occur. B) Scientific laws are facts that describe observed reoccurring natural events. C)Scientific laws explain why natural events occur. D) Scientific laws were theories that have been proven to be true.
Answer:
Option B and D seem to be correct
Explanation:
As a scientific law is a statement which is bases on repeated experimental observations that describes some aspects of nature and also they are were theories that have been proven to be true as a theory become a law when the experiment agree with the theory and no contrary opinions so according to my studies , B and D options are seems to be correct.
products or solutions found at home or in store and their characteristics
Answer:
bruh, just go in your bathroom and look for cleaning products
Explanation:
Your friends car has stalled in the road. You help you friend push the car off the road. Your friend pushed with a force of 55 N and you push in the same direction with a force of 60 N. How much force is being applied to the car
Answer:
115N
Explanation:
your friend and you push the car at the same time at the same direction so you add the force your friend is using and the force you’re using so: 60+55=115N
Would you expect hydrogen chloride to be a gas , liquid ,or a solid at room temp and pressure ?
Answer:
I think they are gases
Explanation:
yes, I think they are gases, but I am not sure.
What are the coefficients when the chemical equation below is balanced?
_Fe + _H2SO4 = _Fe2(SO4)3 + _H2
A) 2,3,3,3
B) 3,2,3,1
C) 1,1,1,1
D) 2,3,1,3
A sample of gas under pressure of 882kPa has a volume of 312cm3. The pressure is increased to 948kPa. What volume will the gas occupy at the new pressure, assuming that the temperature is constant?
Answer:
V₂ = 290.3 cm³
Explanation:
Given data:
Initial pressure = 882 KPa
Initial volume = 312 cm³
Final pressure = 948 KPa
Final volume = ?
Solution:
The given problem will be solved through the Boly's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
882 KPa× 312 cm³ = 948 KPa × V₂
V₂ = 882 KPa× 312 cm³/ 948 KPa
V₂ = 290.3 cm³
Which half-reaction correctly describes an oxidation?
Upper C a (s) plus 2 e superscript minus right arrow upper C a superscript 2 plus (a q).
Upper B r subscript 2 plus 2 e superscript minus right arrow 2 upper B r superscript minus.
Upper N a superscript plus (a q) right arrow upper N a (s) plus e superscript minus.
Upper C r (s) right arrow upper C r superscript 3 plus (a q) plus 3 e superscript minus.
Answer: The Answer was D. These people trolling. Look at the attachments I put on
Explanation:
An oxidation half reaction is one in which electrons are lost. Hence the reaction, Cr^3+(aq) ----> Cr(s) + 3e is an oxidation reaction.
What is oxidation?The term oxidation has to do with the loss of electrons. When an oxidation half reaction takes place, a specie loose electrons. We will now look out for the reaction in which electron loss takes place.
Now, in option D, the reaction is Cr^3+(aq) ----> Cr(s) + 3e. Three electrons where lost here hence this is an oxidation half reaction.
Learn more about oxidation: https://brainly.com/question/9496279?
Name two or more body systems that work together.
Describe how they work together.
Answer:
All of your body systems have to work together to keep you healthy. Your bones and muscles work together to support and move your body. Your respiratory system takes in oxygen from the air
Explanation:
PLEASE HELP WILL mark brainliest
Answer:
BRUH ARE YOU IN FIRST GRADE
Explanation:
How does the mass of an atom effect the amount a charged atom gets deflected?
PLEASEHELP WILL MARK BRAINLIEST
Answer:
2. Isotope, one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties. Every chemical element has one or more isotopes.
3. Since the vast majority of an atom's mass is found its protons and neutrons, subtracting the number of protons (i.e. the atomic number) from the atomic mass will give you the calculated number of neutrons in the atom. In our example, this is: 14 (atomic mass) – 6 (number of protons) = 8 (number of neutrons).
Explanation: Try rewording the questions when looking it up. Hope this helps
Answer:
9. 2(2n^2)
10. Electron Shell
11.-
12.-
13.-
14.-
Explanation:
i hope it helped
The picture shows a periodic table with elements X and Y.
If the atomic number of element X is 3, then what is the atomic number of element Y?
A. 5
B. 7
C. 19
D. 25
Answer:
7
the atomic number of element X is 3, then atomic number of element Y is 7
why is it easier to remove an electron from a sodium atom than a magnesium atom
True or False? If friction didn’t exist, an object in motion would stay in motion forever.
Answer:
True
Explanation:
Friction is defined as the force that opposes motion when an object is sliding over a surface.
As a result of friction, all objects moving over a surface eventually come to rest over time.If we were to successfully create a friction-less surface, an object will remain in motion forever because it will encounter no opposition to its motion.
Hence, the resistance to the motion of objects over a surface which causes the objects to come to a halt after moving over the surface for some time is called friction.
