To answer this, one needs to understand the difference between ionic bonding and covalent bonding. An ionic bond is a bond between an electronegative atom and an electropositive atom in which one atom supplies the valence electrons for the bond and the other uses those electrons to become stable. A covalent bond is a bond between two atoms of similar electrical charge in which both atoms supply a valence electron to form the bond and the electron travels between each atom in the bond.
An easy way to remember these is that an ionic bond is a bond between an atom on the upper right side of the periodic table with an atom on the left side of the periodic table. A covalent bond is a bond between an atom on the upper right side of the periodic table with another atom from the upper right side of the table.
Atoms on the left side don’t really bond with other left-side atoms because they don’t have the negative pull that right-side atoms do. Atoms want to become stable. In order to become stable, they need to have a full valence shell of electrons (that’s 8 electrons). An atom like chlorine has 7 valence electrons, so it REALLY want to bond with something more positive that wouldn’t mind giving up an electron (hence why we have ionic compounds like salt (NaCl)). Because the elements on the left side of the table are electropositive, they don’t have that drive to fill their valence shell, so they won’t bond with other electropositive atoms.
So these molecules that you listed above are covalent because each atom donates an electron to create a bond between atoms. You could also say that they are all elements of the right side of the table, so they can only be covalent.
During MITOSIS!!
mitosis is a fundamental process for life. during mitosis; a cell duplicated all of its contents, including its chromosomes, and splits to form two daughter cells. because this process is so critical, the steps of mitosis are carefully controlled by a number of genes.
Increased air temperatures decrease the salinity of the ocean since more ice is melting adding more fresh water to the oceans, therefore slowing down the great ocean conveyor belt.
<h3>What is an ocean conveyor belt?</h3>
Ocean conveyor belt system in which water moves between the cold depths and warm surface in oceans throughout the world.
Increases in temperatures of surrounding entities like ice and an increase in precipitation adds fresh water into the sea, which lower salinity. Seawater with lower salinity is lighter in density and won't sink as much as denser water.
As the seawater gets saltier, its density increases, and it starts to sink. Surface water is pulled in to replace the sinking water, which in turn eventually becomes cold and salty enough to sink. This initiates the deep-ocean currents driving the global conveyer belt.
Hence, option A is correct.
Learn more about the conveyor belt here:
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S<span>plit people in two groups of Casodex resistant treatment men (double -blind cross-over study) </span>
<span>50% get Casodex 50 mg ( BICALUTAMIDE 50 MG ) 1 tablet daily + 1 placebo tablet </span>
<span>Casodex is an anti testosterone agent. </span>
<span>50% get Casodex 50 mg 1 tablet daily + 1 Tamoxifen 20 mg tablet </span>
<span>Tamoxifen is an estrogen receptor inhibitor </span>
<span>Compare the results of tumor growth over 1 year's time then reverse the groups without the physician or the patient knowing if they are receiving tamoxifen or the placebo tamxoifen then compare tumor growth results again.</span>
Answer:
d = 4.5 g/cm³
Metal cube is made up off titanium.
Explanation:
Given data:
Edge length of cube = a = 11.4 mm
Mass of metal cube = 6.67 g
Density and identity of metal = ?
Solution:
First of all we will calculate the volume of cube.
V = a³
V = (11.4mm)³
V = 1481.54 mm³
mm³ to cm³:
1481.54 mm³× 1 cm³/ 1000 mm³
1.482 cm³
Density:
d = m/v
d = 6.67 g/ 1.482 cm³
d = 4.5 g/cm³
Metal cube is made up off titanium because density of titanium is 4.5 g/cm³.