Answer:
C. is the correct answer
Explanation:
I just completed this question and got it correct.
What neutral element has the electron configuration described by the Aufbau diagram above.
Answer:
Aluminium.
Explanation:
The above electronic configuration can be written in a simplified form as shown below:
1s² 2s²2p⁶ 3s²3p¹
Next, we shall determine the number of electrons in the atom of the element as follow:
Number electron = 2 + 2 + 6 + 2 + 1
Number of electron = 13
Next, we shall determine the number of protons.
Since the element is in its neutral state,
The number of electrons and protons are equal i.e
Proton = Electron
Number of electron = 13
Proton = Electron = 13
Proton = 13
Next, we shall determine the atomic number of the element.
The atomic number of an element is simply the number of protons in the atom of the element i.e
Atomic number = proton number
Proton = 13
Atomic number = 13
Comparing the atomic number of the element with those in the periodic table, the element with the above electronic configuration is aluminium since no two elements have the same atomic number.
what provides the energy needed to fuel the water cycle
Answer:
Sunlight provides the energy
who can answer questions 5 and 6
Find the force if the mass is 6 kg and the acceleration is 12 m/s/s?
Answer:
72 Newton
Explanation:
force=mass x acceleration due to gravity
Force applied on object is 72 Newton
Given that;
mass of thing = 6 kg
Acceleration = 12 m/s²
Find:
Force applied on object
Computation:
Force = mass × acceleration
Force applied on object = 6 × 12
Force applied on object = 72 Newton
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Consider the electron configuration. A box holds an up and a down arrow. A box holds an up and a down arrow. A box holds an up and a down arrow.A box holds an up and a down arrow.A box holds an up and a down arrow. A box holds an up and a down arrow. A box holds an up and a down arrow.A box holds an up and a down arrow.A box holds an up arrow. 1s 2s 2p 3s 3p Which element has this electron configuration? astatine bromine chlorine fluorine
Answer:
Chlorine
Explanation:
Each arrow represents one electron. Most of the boxes are filled, meaning they have two electrons. The last box only has one arrow, so it only has one electron. If you add it up, you get 17, which is Chlorine.
yo someone please help meee The density of silver is 10.5 g/cm3. What is the mass (in kilograms) of a cube of silver that measures 0.69 m on each side?
Mass of the cube of silver is 3,449.34 kg
First find the volume of the cube in centimeters because the density is in centimeters:
0.69 * 100 = 69 centimeters
Volume = Side * Side * Side
= 0.69 x 0.69 x 0.69
= 328,509 cm³
The density of a material is calculated by the formula:
= Mass / Volume
As you have the density already and the volume, you can get the mass:
10.5 = Mass / 328,509
Mass = 10.5 * 328,509
= 3,449,344.50 grams
A kilogram is 1,000 grams so the mass in kg is:
= 3,449,344.50 / 1,000
= 3,449.3445 kilograms
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The sum of the number of protons and neutrons in an atom is called the ________ of the element. 1. Molar Mass 2. Atomic number 3. Average atomic mass 4. Mass number
o2 o4 o3 o1
Answer:
The sum of the number of protons and neutrons in an atom is called the Mass number.
A) remove 1.5ml of liquid
B) add 1.5 ml of liquid
C) remove 0.5 ml of liquid
D) add 0.5 mo of liquid
How do atoms emit light ?
Answer:
The frequencies of light that an atom can emit are dependent on states the electrons can be in. When excited, an electron moves to a higher energy level or orbital. When the electron falls back to its ground level the light is emitted.
A wave has a length of 8 meters and a speed of 32 meters per second. What is the frequency of the wave?
Answer:
f=vλ where: f is the frequency of the wave in hertz. v is the velocity of the wave in meters per second. λ is the wavelength of the wave in meters
f= 32*8 = 256 hertz
Explanation:
Shreya spent $16 on a magazine and some
erasers. If the magazine cost $7 and each
eraser cost $3, then how many erasers did
she buy?
Answer:
she bought 3 erasers an got two dollars back
Explanation:
ANSWER PLEASE!!
Which one of the following explains why the atom in the diagram
is highly reactive?
option c is correct
number of electron in the outermost shell describe the reactivity if the outermost shell is completely filled its mean the reactivity of element is low and if it is completely filled then the element is highly reactive
What is the answer 24.3m
Mass is usually measured in grams and
Why are some isotopes radioactive and some are not?
Answer: there are atoms that either have too many or too few neutrons or protons in their nuclei. This results in an imbalance between the jedi forces holding them together, which leads to an excess of internal energy. Such atoms are said to be unstable or radioactive.
Explanation:
Which statement best describes how the use of gasoline in a car relates to the discipline of chemistry?
The materials used come from the ground,
The gasoline undergoes a change as it burns
A car uses the gasoline to move
All parts of the car are composed of chemicals.
Answer:
The gasoline undergoes a change as it burns.
Explanation:
Just took the Unit Test review ((:
Answer:
b
Explanation:
because i said so brudda
Why do atoms always contain the same number of electrons and protons?
Answer:
An electron is a negatively charged subatomic particle and a proton is a positively charged subatomic particle. Positive charge(s) attract negative charge(s) and vice versa. The proton and neutron stay together and attract one another to give the atom an overall charge of zero (neutral). Which is the charge of an atom. When there is an unequal number of protons and neutrons an ion is formed. If the number of protons are more than the electron, a positively charged ion called cation is formed. On the other hand, if the number of electrons are more than the protons a negatively charged ion called anion is formed.
Answer:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral. ... Chemically, we say that the atoms have formed bonds.
Explanation:
What example of scientific thinking does Bohr response best indicate
Answer:
The Bohr model shows the atom as a central nucleus containing protons and neutrons with the electrons in circular orbitals at specific distances from the nucleus (Figure 1). These orbits form electron shells or energy levels, which are a way of visualizing the number of electrons in the various shells
True or false: Only liquids can be described as fluids. I NEEED HELPP NOWWW
Answer:
Explanation:
no, as it can also be used to describe a gas- a fluid includes liquids, gases and plasms
Question 3 of 10
Which of the following elements shows little reactivity?
A. Potassium (K)
B. Sulfur (S)
C. Fluorine (F)
O D. Argon (Ar)
Answer: Correct answer is
Ar- Argon
Explanation:
A P E X :)
help me please i need to sleep
Cloud is a gas.
ice is a solid.
snow is a solid.
steam is a gas.
rain is a liquid.
What does the atomic mass come from on the periodic table?
The atomic mass comes from isotopes on the periodic table.
I have no clue on what to do
Answer:
A.
Explanation
Because it is totally irrelevant to what the question is asking.
Which amino acid is least likely to produce a hydrogen bond with water or polar molecules?
If a gas has a mass of 468 grams and its density is 17 grams per liter, how much volume does it occupy?
Answer:
The answer is
27.53 LitresExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{Density} [/tex]
From the question
mass = 468 g
Density = 17 g/L
Substitute the values into the above formula and solve
We have
[tex]volume = \frac{468}{17} \\ = 27.529411[/tex]
We have the final answer as
27.53 LHope this helps you
How does peer review affect research?
Experimental results will be trusted by the scientific community only if they have been peer-reviewed. Thus, option A is correct.
What is research?Research is the creation of new knowledge and/or the use of existing knowledge in a new and creative way so as to generate new concepts and understandings.
“Peer-reviewed” means that the paper is analyzed by fellow scientists, who evaluate the logic or methodology that might shed doubt on the findings.
Learn more about the research here:
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What's the largest planet on Earth?
Answer:
Asia
Explanation:
Answer:
Asia.
Explanation:
The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide?
Answer:
the answer is A :)
Explanation:
What’s the phase change to solid to gas
How do you do a one pager online!?!?!
I couldn’t find science so I just chose chemistry