The lack of a spinal column is the distinguishing characteristic of invertebrates.
<h3>What is an Invertebrate?</h3>
These are organisms which lack a backbone(vertebral column) while vertebrates on the other hand have it.
This is why option C was chosen as the most appropriate choice in this scenario.
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Answer:
- <em>The oxidation state of chromium in K₂Cr₂O₇</em> is<u> 6⁺ (i.e. + 6).</u>
Explanation:
You can calculate the <em>oxidation number</em> of most elements following some simple rules.
This is how you do it for chromium in K₂Cr₂O₇.
1) Rule: in a neutral compound the net oxidation number is zero (0).
Hence, sum of the oxidation numbers of K, Cr and O in K₂Cr₂O₇ is 0.
2) Rule: The most common oxidation number of oxygen in compounds, except in peroxides, is 2 ⁻ (negative 2).
3) Rule: the most common oxidation state of alkali metals is 1⁺ (positive 1)
4) Rule: multiply each oxidation state by the corresponding number of atoms in the compound (the subscripts)
↑ ↑ ↑
K Cr O
Hence, the oxidation number of chromium in this compound is 6⁺.
Answer:
c.
Explanation:
One of the main differences between an atom and an element is that an atom can be combined but an element cannot be combined. There are many combinations of atoms that make up different gases, liquids, and solids each with a unique makup. For example, water is made up of two hydrogen atoms and one oxygen atom (H20). Elements are made up of only the same type of atom. For example, the element Hydrogen can only contain hydrogen atoms, while the element Carbon can only contain carbon atoms.
Answer:
Four Four
Explanation:
A molecule is formed by the overlap of orbitals. The combination of atomic orbitals during bond formation leads to the formation of bonding and anti bonding molecular orbitals.
When a molecule is formed, the number of bonding molecular orbitals must be equal to the number of anti bonding molecular orbitals.
Hence, when methane is formed, four bonding and four anti bonding orbitals are formed because methane forms four bonds per molecule.