Identify each charge of the subatomic particles ? <br><br> Help me please ASAP

Explain how to use the periodic table to deduce the number of protons, neutrons and electrons of an atom of a specific element

Ksju [112]

Answer:

See explanation

Explanation:

The periodic table shows the atomic number and mass number of each element.

We know that the atomic number shows;

The number of protons in the nucleus of the atom
The number of electrons in the neutral atom of the element.

So we obtain the number of protons and electrons by looking at the atomic number shown in the periodic table.

We also know that;

Mass number = Number of protons + number of neutrons

Since number of protons = atomic number of the atom

Number of neutrons = Mass number - atomic number

Hence we obtain the number of protons by subtracting the atomic number from the mass number given in the periodic table.

5 0

3 years ago

Burning magnesium is introduced into steam

qaws [65]

Answer:

It produces magnesium oxide and hydrogen gas.

Explanation:

When magnesium burns with steam it produces magnesium oxide which is white in color and hydrogen gas. When magnesium burns, it mixes with the oxygen present in the air produces magnesium oxide in powder form. Magnesium react with oxygen by giving two electrons present in its valance shells while the oxygen needs two electron for completing their valance shell and becomes stable.

4 0

3 years ago

Help me now, please!

Nikitich [7]

Answer:

1. SnO2 = 1; H2 = 2; Sn = 1; H2O = 2

2. I mole of SnO2 is required to react with 2 moles of H2 to produce 1 mole of Sn and 2 moles of H20.

The balanced equation represents 1 mole of SnO2

3. Total mass of reactants and products are each 154.71g respectively

Explanation:

1. According to the law of conservation of mass, the total mass of reactants in a chemical reaction is equal to the mass of products.

Therefore, a balanced chemical equation has equal number of moles of each atom on the reactants side and on the product side. The balanced chemical equation for the reaction above will be:

Sn02 + 2H2 + Energy -----> Sn + 2H2O

Sn has 1 mole of atoms on both sides

O has 2 moles of atoms on both sides

H has 4 miles of atoms on both sides.

2. According to the balanced chemical equation above,

1 mole of SnO2 reacts with 2 moles of H2 to produce 1 mole of An and 2 moles of H20.

This balanced equation represents 1 mole of SnO2.

3. The atomic masses of Sn, O and H are 118.71g, 16g and 1g respectively.

Therefore, the molar masses of the reactants and products are;

SnO2 = 118.71 + 16 * 2 = 150.72g

H2 = 2 *1 = 2g

H2O = 2 * 1 + 16 = 18g

Total mass of reactants = 150.71g + 2 * 2g = 154.72g

Total mass of products = 118.71 + 2 * 18g = 154.71g

3 0

3 years ago

Why does the rate of the reaction decrease over time? Why does the rate of the reaction decrease over time? Exothermic reactions

fgiga [73]

Answer: The rate of the reaction decrease over time as the reaction proceeds, a decrease in the concentration of reactants results in fewer successful collisions.

Explanation:

Rate of a reaction is defined as the change in concentration of products and reactants with respect to time.

The rate of a reaction decreases with times because reactants are converting into products.

As a result, the reaction is proceeding with a decrease in the concentration of reactants due to which less number of collisions between the reactant molecules will be there.

Hence, rate of reaction will decrease.

Thus, we can conclude that the rate of the reaction decrease over time as the reaction proceeds, a decrease in the concentration of reactants results in fewer successful collisions.

3 0

3 years ago

HELPP!!!!!

Inessa [10]

Answer:

The solution turns purple because ammonia is a base.

The solution turned red.

Ammonia gas is neutral, but ammonia solution ( ammonium hydroxide ) is a base.

Adding vinegar to ammonia suppresses its dissociation hence decrease in hydroxyl ion concentration.

If more ammonia is added to the solution, the pink color re-appears.

5 0

3 years ago

Identify each charge of the subatomic particles ? Help me please ASAP