One of the clues are that there will be a change in temperature. Usually when a reaction takes place heat will be absorbed or released resulting in a change of temperature. Hope this helped!
Answer:
Lead, Pb.
Explanation:
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In this case, since the molar mass of the compound is 293.8 g/mol, and the molecular formula is NaXO₄, we infer that the molar mass is computed via:
Thus, we can solve for the atomic mass of X as shown below:
Thus, the element whose atomic mass is about 206.8 g/mol is lead (207.2 g/mol) even when it is not properly a transition metal.
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Answer:
b. d. f. h
Explanation:
Anions are negatively charged. They are usually non metals with few exceptions. They need to gain electrons in order to form and they are always listed after cation in a compound.
The answer is- Magnitude of melting point of group 1A metals decreases down the group.
The melting point is the temperature at which a given solid material changes from a solid state to a liquid or melt state.
On what factors, the melting point of an atom depends?
- The melting point is governed by the attraction of the electrons of an atom towards its nucleus.
- Thus, size of the ion plays crucial role. Smaller the size of ion, greater is the attraction and thus greater is the melting point.
- Now, Group 1A elements are also called alkali metals and they include Lithium, Sodium, Potassium, Rubidium, Cesium, and Francium.
- As moving down the group, the size of atom increases , thus the attraction between the electrons and nucleus decreases, and thus the melting point decreases.
To learn more about the melting point of alkali metals, visit:
brainly.com/question/15220625
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Answer:
I don't understand this question so if you
get answers let me know