Which element has 47 protons?silver
Answer:
The answer is Silver
Numbers of Protons in Silver: The element Silver (Symbol Ag) has the Atomic Number of 47. Any atom that contains exactly 47 protons in its nucleus is an atom of silver.
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List 2 reasons why metals are such great conductors.
PLEASE HELP THIS IS TIMED
Answer:
the atoms in the metals form a matrix through which outer electrons can move freely.
Explanation:
A flow of charged particles is an electric current. A metal has a built in supply of charged particles that can flow from one location to another- the pool of shared electrons.
what is the most abundant metal in the earth's crust ?
Answer:
aluminium
Explanation:
I think I'm not Rly sure
Answer:
Aluminium
Explanation:
Percent abundance of given elements in the earth's crust are :
Oxygen - 46.6%
Aluminium - 8.1%
calcium-3.63%
gold-0.0011%
But oxygen is a non-metal and aluminium, calcium and gold are metals.
Therefore, Aluminium is the most abundant metal in the earth's crust.
can you pair electrons in degenerate orbitals before filling each orbital halfway
whats the name of CaS?
Answer
Chemical formula or Chemical Abstracts Service
Explanation:
A CAS (Chemical Abstracts Service) Registry Number is a unique identifier that tells you, for example, that acetone and dimethyl ketone are actually the same substance.
Explain why transition metals do not have a predictable pattern for the
ionic charges they form.
Explanation:
Many transition metals cannot lose enough electrons to attain a noble-gas electron configuration. In addition, the majority of transition metals are capable of adopting ions with different charges.
The reason why transition metals do not have a predictable pattern should be explained below.
What are transition metals?It comprises many chemical elements that contains valence electrons with respect to the participation in the creation of the chemical bonds. The various transition metals should not lose sufficient electrons for attaining the noble gas electron configuration. The majority of the transition metal should be capable of adopting the ions with the distinct charges.
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Name the element: 1s2 252 2p 3s2 3p6 453 3d9
O Strontium Sr
O Krypton Kr
O Tungsten W
O Copper Cu
Silver Ag
Silicon Si
Answer:
Cu
Explanation:
The sublevel notation is
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹
The element is unknown;
To find the element, sum the superscipts because the indicate the electrons;
2 + 2 + 6 + 2 + 6 + 2 + 9 = 29
The element with 29 electrons is copper
A salad including lettuce, tomatoes, and onions would be classified as a
A) compound.
B) element.
C) mixture.
D) solution.
Answer:
C)Mixtured
Explanation:
I know the answer
HELP I WILL GIVE BRAINLIEST
What phase change is the following substance undergoing?
First, the particles of this substance are closely packed and
are not easily compressed. After the change, the substance
can flow easily but cannot be easily compressed.
a freezing
b melting
Cevaporation
d deposition
e sublimation
Answer:
b melting
Explanation:
The phase change the substance is undergoing is from solid to liquid and this is called melting.
To understand this process, we need to know the the substance changing. A substance that contains particles that are not easily compressed and packed is a solid. Solids have fixed shapes and volumes. Liquids can easily flow although they cannot also be easily compressed.The phase change from solid to liquid is facilitated by a melting process.
The Ca +2 ion is isoelectronic with ?
Answer:
nut
Explanation:
GIVING BRAINLEST WITH WHOEVER HAS THE RIGHT ANSWER! Plz and Tysm.
Which is more dense?
1. Continental Crust
2. Oceanic Crust
3. Both
4. Neither one
in the liquid state hydrogen is used as a fuel in
Answer:
Space Technology
Explanation:
Why might it be important to identify isoelectronic ions/atoms?
Answer:
Isoelectronicity may be used to predict the properties and reactions of a species. It is used to identify hydrogen-like atoms, which have one valence electron and are thus isoelectronic to hydrogen.
Explanation:
What do all cells requiere a constant supply of
Which of the following is an example of aerobic respiration?
A.Using yeast to make dough
B.Respiring while swimming underwater
C.Plant roots respiring in soil
Answer:
i think the other person is wrong because humans cant breathe underwater
Explanation:
i say c. is the answer
help please , i’ll give u extra points
Answer:
I think c
Explanation:
cuz it says it's only friction to the left and actual force to the right
What is a substance so pure it cannot be broken down? *
Element
Compound
Mixture
Atom
Answer:
Element
Explanation:
This is a pure substance which can't be split into simpler substances by chemical means
A boxed 10 kg computer monitor is dragged by friction 5.5 m up along the moving surface of a conveyor belt inclined at an angle of 36.9° above the horizontal. If the monitor’s speed is a constant, how much work is done on the monitor by friction?
Answer:
324 J
Explanation:
58.84 * 5.5 J = 324 J
I got 58.84 by 10 * 9.8 (gravity) * sin(36.9)
The amount of work done on the monitor by friction is equal to 431 Joules.
Given the following data:
Mass of computer monitor = 10 kgDistance = 5.5 metersAngle of inclination = 36.9°To determine the amount of work done on the monitor by friction:
Mathematically, work done is given by the formula:
[tex]Work\;done = mgdcos\theta[/tex]
Where:
m is the mass of an object.g is the acceleration due to gravity.d is the distance.Substituting the given parameters into the formula, we have;
[tex]Work\;done = 10 \times 9.8 \times 5.5 \times cos(36.9)\\\\Work\;done = 539 \times 0.7997[/tex]
Work energy = 431 Joules.
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Which substance can be broken down by chemical means?
Answer:
compounds
Explanation:
Compounds – pure substances that are the unions of two or more elements. They can be broken into simpler substances by chemical means.
A mountain climber at the peak of a mountain has _____
energy.
Answer:
Potential energy
Explanation:
A mountain climber at the peak of a mountain has potential energy.
The potential energy of a body is stored energy in a body. It is function of mass and position of the body.
Mathematically;
P.E = mgh
m is the mass
g is the acceleration due to gravity
h is the height
What are the missing coefficients for the skeleton equation below?
NH3 (g) + O2(g) → N2(g) + H2001)
Answer:
4, 3 , 2 and 6
Explanation:
The reaction equation is given as;
NH₃ + O₂ → N₂ + H₂O
Now, we need to balance the reaction equation;
NH₃ + O₂ → N₂ + H₂O
put the numbers a,b,c and d;
aNH₃ + bO₂ → cN₂ + dH₂O
We need to balance the equation algebraically, ;
Conserving N;
a = 2c
Conserving H;
3a = 2d
Conserving O;
2b = d
Now, let c = 1, a = 2, d = 3 and b = [tex]\frac{3}{2}[/tex]
multiply through by 2;
a = 4, b = 3, c = 2 and d = 6
Insert the parameters:
4NH₃ + 3O₂ → 2N₂ + 6H₂O
When a substance changes its state, all BUT ONE of these statements ist
A)
Mass remains constant.
B)
Only the form changes.
Kinetic energy changes.
D)
Something chemically new is formed.
Science
Answer:
Science...Only the form changes.Kinetic energy changes.
Explanation:
SCIENCE
Answer:
"Something chemically new forms" is the incorrrect statement
Explanation:
When a substance changes its state, it retains its mass even though its form and kinetic energy changes. It is simply moving between states, that is: loosing energy or gaining it. its chemical composition does not change.
Have a good day dude
A student in class drops an element on the floor and it shatters quite easily. Which property does this best exemplify?
Answer:
Glass
Explanation:
is it true or false that ALL organisms are made of MANY cells?
Answer:
I think false.
Explanation:
I say false because most living organisms are made up of one cell.
Answer:
yes!
Explanation:
the cell is the basic unit of life; and new cells arise from existing cells
Determine what elements are denoted by the following electron configurations:
5) 1s2 2s2 2p6 3s2 3p4
6)
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1
Answer:
5. Sulphur .
Explanation:
sulphur has the electron configuration above because it has 16 atomic number
What is the overall net charge of an ionic compound?
O 1-
O 1+
O 2-
O 0
Question 2 (1 point)
Given the following UNBALANCED equation,
Ca + HCl → CaCl2 + H2
what are the correct coefficients?
а
b
2,1,2,1
3,2,1,1
1,2,1,1
с
d
1,1,1,2
e
2,2,2,1
4 Al + 302 → 2Al2O3
If a chemist does the reaction and produces 3.5 moles of aluminum oxide, how many moles of O2 were used in the reaction?
According to the stoichiometry and given chemical equation ,5.25 moles of oxygen are used in the reaction to produce 3.5 moles of aluminium oxide.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
In the given chemical equation, 3 mole of oxygen produces 2 moles of aluminium oxide.
Therefore for 3.5 moles of of aluminium oxide to be produced 3.5×3/2= 5.25 moles of oxygen are used.
Thus, 5.25 moles of oxygen were used in the reaction to produce 3.5 moles of aluminium oxide.
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Animals respond to external stimuli, such as light, temperature, and danger. Explain what body system is utilized when animals go into fight or flight mode
