Which of the following, if added to soil, would lower the base saturation? A) Sodium B) Potassium C) Magnesium D) Calcium E) Aluminum

Answers

Answer 1

Answer:

Answer: d

Explanation:

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The valency of chlorine is one.why?

2. How old are the oldest fossils? Oldest rocks?During what period were these found?
IT

Answers

Answer:

Fossils: 3.5 billion. Rocks: 4.28 billion

they were found during Haden Eon

Explanation:

The transition metal with the smallest atomic mass

Answers

Transition metal which possesses smallest atomic mass is scandium.

What are transition metals?

The transition metals are defined as the elements in which atoms are present whose d-sub-shell is partially filled .Due to which they give rise to cations with an incomplete d-sub-shell.

They are also defined as the elements which are present in the d-block of the periodic table, which includes groups from three to twelve.These elements are called transition elements as they show a transition between highly electro-positive group 1 and highly electro-negative group 17 elements.

They have characteristic properties due to which they can exist in variable oxidation states , form colored complexes and have catalytic properties as well.These elements are all technologically very important.

Learn more about transition elements,here:

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The transition metal with the smallest atomic mass is Scandium (Sc).
Hope this helps~

Consider the group 1A elements sodium (period 3), potassium (period 4), and rubidium (period 5). What would you predict about the ionization energies of these elements?

Answers

It can be predicted that the ionization energies of these elements increase as you go up a period. This means that sodium has the greatest ionization energy, while rubidium has the least. This is due to the placement or distance of the valence electrons from the nucleus of these elements. When you go up a period, this distance decreases, making it harder to overcome the attraction between the nucleus and the electrons. The harder it is to overcome this attraction, the higher the ionization energy needed.

Given the balanced equation representing a reaction:6Li +N2 --> 2Li3N
Which type of chemical reaction is represented by this equation?
(1) synthesis (2) decomposition
(3) single replacement (4) double replacement

Answers

Answer : The correct option is, (1) synthesis

Explanation :

Synthesis reaction : A type of chemical reaction in which multiple reactants combine to form a single product.

It is represented as,

$X+Y\rightarrow XY$

Decomposition reaction : A type of chemical reaction in which a single reactant decomposes into two or more products.

It is represented as,

$XY\rightarrow X+Y$

Single replacement reaction : A type of chemical reaction where the more reactive element replace the less reactive element.

It is represented as,

$A+BC\rightarrow AC+B$

(A is more reactive element and B is less reactive element)

Double replacement reaction : A type of chemical reaction in which a positive cation and a negative anion of two reactants exchange their places to form two new products.

It is represented as,

$AB+CD\rightarrow AD+CB$

(A and C are the cations, B and D are the anions)

The given balanced reaction is,

$6Li+N_2\rightarrow 2Li_3N$

The given reaction is an example of synthesis reaction in which lithium combine with the nitrogen to form a single product as lithium nitride.

Hence, the correct option is, (1) synthesis reaction

(1) synthesis is the answer because only one product is formed~

Which choice below would affect the rate of reaction in the opposite way from the other four? a. Cool the reaction down
b. Add a catalyst
c. Decrease the pressure
d. Use larger pieces of solid reactants
e. Decrease the concentration of the reactants

Answers

Adding a catalyst as this would speed up the reaction and the rest would slow it down

Which compound is an electrolyte?
(1) C6H12O6 (3) CaCl2
(2) CH3OH (4) CCl4

Answers

I think the correct answer is option 3. CaCl2 is the compound that is an electrolyte when dissolved in water. An electrolyte is a substance that conducts electricity in solution. Calcium Chloride when in solution dissociates into ions which allows the flow of current in the solution.

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