Answer:
Oxygen needs access to two electrons to reach a full octet. Each calcium atom has two valence electrons that it prefers to lose to obtain a full octet. Therefore, one oxygen atom and one calcium atom complement each other and form an ionic bond.
Explanation:
The bond between oxygen and calcium must be ionic given the fact that the electronegativity difference between them is about 2.44.
Calcium prefers to loose two electrons while oxygen receives these two electrons hence the both atoms attain the octet structure.
Recall that an ionic bond is formed by the loss and gain of electrons by two bonding atoms (complete transfer of electrons). Thus the bond between each calcium and oxygen atom is ionic.
Which type of bond will chromium atoms likely to form with other chromium atoms
A:ionic
B:covalent
C:metallic
Answer: B
Explanation: Covalent bonds where electrons are not shared equally between two atoms are called polar covalent bond. As shown above, the electrons in a covalent bond between two different atoms (H and Cl in this case) are not equally shared by the atoms. This is due to the electronegativity difference between the two atoms.
There are two types of chemical compound one is covalent compound and other is ionic compound in chemistry. The covalent bond will be formed between two chromium atoms. the correct option is option B.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Covalent bond formed by sharing of electron and ionic bond formed by complete transfer of electron.
Element with same electronegativity difference combine together by covalent bond whereas ionic bond is formed by elements whose electronegativity difference is high.
As two chromium is combining that is two two element with same electronegativity is combining therefore, formation of covalent bond is the only possibility.
Therefore covalent bond will be formed between two chromium atoms. the correct option is option B.
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Which screw would create a strong hold?
A: The screw with 9 wraps.
B: The screw with 2 wraps.
C: The screw with 10 wraps.
D: The screw with 6 wraps.
Answer:
The screw with 10 wraps is the correct answer
Explanation:
The screw with 6 wraps would create a strong hold.
What do you mean by screw?The strongest member of the family of wood screws is a lag screw. It is a reliable and sturdy fastener that frequently has a square head or an externally powered hex drive.
In general, lag screws are significantly stronger and heavier than standard wood screws. They have a tapered point and coarse threads.
Thus, The screw with 6 wraps would create a strong hold.
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Identify a metal from the following
(1) Sulphur
(2) Boron
(3) Silicon
(4) Sodium
Answer:
sodium
Explanation:
it is an alkali metal
help which is the right answer
Answer:
936g/mol
Explanation:
To find the molar mass of a molecule, you find the sum of the molar masses of each atom in the molecule.
This compound has 40 carbon atoms, 60 Hydrogen atoms, 10 Nitrogen atoms, 12 Oxygen atoms, and 2 Sulphur atoms.
The molar mass of:
Carbon is 12g/molHydrogen is 1g/molNitrogen is 14g/molOxygen is 16g/molSulphur is 32g/mol[tex](12 \times 40) + (60 \times 1) + (14 \times 10) + (16 \times 12) + (32 \times 2) = 936[/tex]
Exothermic reactions release energy. Where is the energy used for these reactions to occur stored? .
Answer:
In the chemical bonds.
Explanation:
There are different types of chemical bonds, some store a TON of energy while others do not store as much. You can think of it like this: for bonds with low energy, it takes a LOT of force to pull them apart, meaning they are strong bonds. However, this way, you have to put energy into them to break the bonds and form a chemical reaction. This is an endothermic reaction, a reaction that absorbs heat from its surroundings.
Instead, bonds in exothermic reactions are BEGGING to form a more stable bond, and hence store a lot of potential energy. Due to the difficulty of maintaining these bonds, there is a lot of energy put into them. If you break them, however, (exothermic reaction) the energy is released, and hence the exothermic reaction happens.
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Which property of waves is the distance between one point on a wave and that same point on the wave next to it?
A.
amplitude
B.
wavelength
C.
frequency
D.
speed
Dating of Rock Layers
Answer all 12 questions relating to the images below
English (US)
100
Answer:
I'm sorry, we need the image to answer it.
Explanation:
The production of 2-methyl-2-phenyl propane. This would be a two-step synthesis.
Can someone explain what is this reaction ?
how to know the unknown metal in flame test
Explanation:
The flame test is used to visually determine the identity of an unknown metal or metalloid ion based on the characteristic color the salt turns the flame of a Bunsen burner. The heat of the flame excites the electrons of the metals ions, causing them to emit visible light
an atomic mass unit is defined as exactly
Answer:Mass of an atom
Explanation:
Answer:Atomic Mass Units (amu): a mass exactly equal to one-twelfth mass of carbon-12 atom.
Explanation:
What change occurs to an atom when it forms negative ion
Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ion. Therefore, when an atom forms a negative ion, atom become cation.
What is Ions?Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.
Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state. When an atom forms a negative ion, then atom itself gain positive charge over it and become cation by loosing electron.
Therefore, when an atom forms a negative ion, atom become cation.
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A new material was produced in a laboratory by bonding atoms of
different elements together in a unique arrangement. Other laboratories
were able to reproduce these results, producing the same material with
the same elements in the same arrangement. What type of matter was
produced?
*
Answer:
A compound
Explanation:
A compound is a substance formed from the chemical combination of atoms of two or more elements together.
A chemical compound always contains the same kinds of atoms of elements combined together in as specific ratio by mass and can be represented by a chemical formula. For example, water is a compound formed from the chemical combination of hydrogen and oxygen atoms in the ratio of 2 : 1. It has a chemical formula H2O.
A pure compound also always have the same chemical properties irrespective of the source of the compound. For example, chemically pure has similar properties irrespective of whether it is obtained from rain, streams or underground wells.
Therefore, if a new material was produced in a laboratory by bonding atoms of different elements together in a unique arrangement and other laboratories were able to reproduce these results, producing the same material with the same elements in the same arrangement, then the substance must be a compound.
How many orbitals surround the nucleus in a neutral atom of sulfur (S)?
1
3
5
6
Which element is likely to be the best conductor of electricity?
copper
lithium
iodine
silicon
Answer:
copper
Explanation:
Answer:
COPPER!!!!!
Explanation:
I got it right on the test, on Edge. Hope this helps. :))))
Which of these most likely occurs to result in the formation of these mountains?
Answer:
thanks
Explanation:
youre awesome
What is the charge on a calcium atom that contains 18e−?
Answer:
13 +2 =15
Explanation:
Is vacuole a plant or animals cell
Answer:
plant
Explanation:
let me know if correct
4. When the sulfide ion is oxidised to the sulfur atom, the number of
1 point
protons in the nucleus ... increase or decrease
Answer:
increase
Explanation:
Oxidation, in chemistry, refers to when electrons are lost by an atom, hence, making the atom more positively charged. In contrast to this is reduction, which is the acceptance of electrons.
In this case, a sulfide ion (S²-) is said to be oxidized i.e loses electrons, till it becomes a sulfur atom (S). As the oxidation number has increased from -2 to 0, this means that the number of protons has INCREASED.
what is the approximate size of e coli
Answer:
Escherichia coli is a typical gram-negative rod bacterium. Its dimensions are those of a cylinder 1.0-2.0 micrometers long, with radius about 0.5 micrometers. Another gram-negative rod, less metabolically independent than E. coli, is Hemophilus influenzae, which has half the length and diameter.
Explanation:
As more potassium sulfate dissolves in the water, the mixture becomes..
PLEASE HELP ME
Answer:
it will become heterogenous and as well asit will dissociate into ions
also it will form base and evolve h2gas
Answer:
the mixture becomes more concentrated
Explanation:
this is due to more solute ions of potassium sulphate than solvent ions of water
where is carbon dioxide found in nature
Explanation:
the air you breathe is called carobon dioxide = co
Answer:
in atmosphere
Explanation:
The global average atmospheric carbon dioxide in 2019 was 409.8 parts per million (ppm for short), with a range of uncertainty of plus or minus 0.1 ppm. Carbon dioxide levels today are higher than at any point in at least the past 800,000 years
Due today please please help!! :
Answer:
3,1,4,2
Explanation: the time is the longest for the liquid that has the biggest viscosity
What color are the stars on the diagram with the highest surface temperatures?
Answer: surface temperature
Explanation:
13 Apply Place a check mark in the box to indicate
which type of mutation is being shown.
Original sequence
deletion insertion substitution
deletion insertion substitution
deletion insertion substitution
Answer:
A. ✔️Substitution
B. ✔️Insertion
C. ✔️Deletion
Explanation:
In A, the type of mutation that is shown is Substitution. In B, the type of mutation shown is Insertion and in C, the type of mutation shown is Deletion.
Mutation refers to the change in the DNA sequence. This occurs in an organism. In gene mutation, the structure of DNA molecule changes and produces a different allele of a gene. While in chromosome mutation, there is the change in the structure or number of the whole chromosomes in a particular cell.
Actually, mutations can take place both in prokaryotic cell and in eukaryotic cell.
In genetics, there are: Substitution, Insertion and Deletion mutations.
Substitution mutation is an exchange of one base for another. Insertion mutation is simply addition of one or more nucleotide pairs in a DNA sequence while Deletion mutation refers to the situation in which a sequence of DNA is left out when there is DNA replication.
Answer:
A. Substitution
B. Insertion
C. Deletion
Explanation:
A. There is a replacement in C G there is A T.
B. There is one more base.
C. There are 8 base there should be 9.
Please help me !!!!!!
Answer:
30 N
Explanation:
To find force you multiple mass by acceleration. If you multiple 10kg by 3 m/s you then get 30 N.
Answer:
30 N
Explanation:
Force can be found by multiplying the force by the acceleration.
F=m*a
The mass of the bowling ball is 10 kilograms. The acceleration is 3 meters per second squared.
• m= 10 kg
• a= 3 m/s^2
Substitute the values into the formula.
F= 10 kg * 3 m/s^2
Multiply.
F= 30 kg*m/s^2
• 1 kilogram meter per second squared is equal to 1 Newton.
• Therefore our answer of 30 kg*m/s^2 is equal to 30 Newtons.
F= 30 N
The correct answer is B. 30 Newtons.
what is the electron configuration of a transition metal in block d
Answer:
U gotta check ur book for that or Google maybe..
Name a molecule that is small enough to enter the cell
protein molecule
starch molecule
oxygen molecule
nitrogen
Answer:
oxygen molecule
Explanation:
I belive it is oxygen molecule
Answer:
Oxygen Molecle
Explanation:
I think that it is an oxygen molecule because oxygen can go through and or everything.
(02.05 LC)
Which type of heat transfer takes place when objects touch each other? (3 points)
A Conduction
B Convection
C Radiation
D Temperature
Answer: That is Conduction
Explanation:
:)
Conduction
reason: Conduction is the transfer of heat through contact between items.
(Brainliest, please?)
please help
How are weather satellites and weather stations similar?
A They both capture images of clouds, storms, and snow.
B They both collect weather data from various locations.
C They both observe weather conditions from the atmosphere.
D They both require a human to be present for data collection.
Answer:
A is the answer.
Explanation:
Answer: the answer is B hope it hepls
Explanation:
ill give u 30 points if u answer this question
Answer:
help can't see what it says
Explanation:
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