Elements in the same blank on the periodic table have the same number of valence electrons
2 answers:
Answer:
- Yes, it is true that elements in the same blank on the periodic table have the same number of valence electrons.
- As, the periodic table is the systematic arrangement of the different elements based upon the different elements properties (both physical and chemical). As the groups are vertical blocks in which those elements are arranged which posses or has the same number of electrons inside there electronic configuration.
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Answer: The correct option is A.
Explanation: In a chemical reaction, reactants react to form a number of products.
For the formation of products, the bonds of the individual reactants must be broken and the bonds of the products must be formed.
For example: Formation of water from hydrogen gas and oxygen gas. Reaction follows:
The Bonds of hydrogen and oxygen molecule are broken and new bonds between hydrogen and oxygen atoms are formed to give water molecule.
Answer:
The correct answer is:
An electron will be emitted in the second experiment, but it cannot be determined whether it will reach the second plate.
Explanation:
In fact, violet has higher frequency than green light. This means that photons on violet carry more energy than photons of green light (remember that the energy of a photon is proportional to it's frequency:
, so when they hit the surface of the metal, more energy is transferred to the electrons. The electron was already emitted with green light, so it must be emitted with also violet light, given the more energy transferred.