Sodium's atomic number is 11. What does this tell you about an atom of sodium?

Answers

Answer 1

Answer: This tells us that an atom of sodium contains 11 electrons which is balanced by 11 protons. The atomic mass of the atom is then the sum of the protons and neutrons. If you know the atomic mass of sodium, you can subtract 11 (protons) to get the number of neutrons.

Related Questions

1.11g of methane CH4 is burned in a bomb calorimeter containing 1000 grams of water. The initial temperature of water is 24.85 degrees Celsius. The specific heat of water is 4.184 J/g degrees Celsius. The heat capacity of the calorimeter is 695 J/degrees Celsius. After the reaction the final temperature of the water is 35.65 degrees Celsius. Calculate the heat absorbed by the water. Then calculate the heat absorbed by the calorimeter.
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Which of the following is a radioisotope used to date rock formations older than 50,000 years?a. Carbon-14.
b. Uranium-235.
c. Cobalt-69.
d. Carbon-12.

Answers

You use uranium, carbon 14 half life is such that after 50000 years there won't be much left in the sample.

Cations are formed by _____. gaining protons losing protons gaining electrons losing electrons

Answers

Cations are formed by losing electrons in the valence shell of atoms. There are more protons than electron ions making the atom more positive.

An anion has gained electrons and therefore has more electrons than protons. It has a negative charge.

An example if this doesn't make too much sense.

Charged Atoms: If electrons are removed from an atom, that atom becomes positively charged because it has more positive charge carriers (protons) than negative charge carriers (electrons)

These types of charged atoms are called positive ions or, cations. DEPENDING ON THE CIRCUMSTANCES, the removed electrons can remain free or they may attach themselves to another atom that can accept extra electrons. If this occurs, a negatively charged ion, or anion, is created.

I hope I made this clear enough for anyone who needed help on this. Hope this helps!!! Have a great day :)))

Determine the number of neutrons in an atom of Si-29

Answers

15 as 29 (atomic mass-number of neutrons and protons) - 14 (atomic number-number of protons)

What is the most abundant gas in Earth's present day atmosphere?methane
oxygen
carbon dioxide
nitrogen

Answers

nitrogen. air consists 78% of nitrogen gas

The answer is nitrogen

According to the big bang theory, approximately when did the universe begin?4 billion years ago
7 billion years ago
11 billion years ago
13 billion years ago

Answers

The correct answer is 13 billion years ago.

The Big Bang theory is the existing cosmological model for the apparent universe from the most primitive known periods via its consequent large scale evolution. The model illustrates that how the expansion of the universe took place from a very high temperature and high-density state and provides a complete illustration for a wide array of processes comprising the existence of cosmic microwave background, light elements, Hubble's law, and large scale structure.

The complete measurements of the rate of expansion of the universe put the Big Bang at approximately 13.8 billion years ago, that is, thus regarded as the age of the universe.

According to the big bang theory it would be around 13 billion years ago.

A cylinder with a movable piston contains a sample of gas having a volume of 6.0 liters at 293 K and 1.0 atmosphere. What is the volume of the sample after the gas is heated to 303 K, while the pressure is held at 1.0 atmosphere?(1) 9.0 L (3) 5.8 L
(2) 6.2 L (4) 4.0 L

Answers

The volume of sample when the gas is heated to 303 K is $\boxed{{\text{(2)6}}{\text{.2 L}}}$

Further explanation:

Charles’s law:

Charles’s work showed that at constant pressure, the volume-temperature relationship for a fixed amount of gas is linear. In other words, Charles’s law can be stated that at constant pressure, the volume occupied by a fixed amount of a gas is directly proportional to its absolute temperature (Kelvin). This relationship is known as Charles’s law.

The mathematical representation of Charles’s law is,

${\mathbf{V}}\propto{\mathbf{T}}$ [P and n are constant]

Where,

⦁ V is volume occupied by the fixed quantity of gas.

⦁ T is the temperature of a gas.

⦁ P is the pressure of a gas.

⦁ n denotes the number of moles of gas.

The relationship can also be expressed as,

$\frac{{\text{V}}}{{\text{T}}} = {\text{constant}}$ [P and n are constant]

Or it can also be expressed as follows:

$\frac{{{{\text{V}}_{\text{1}}}}}{{{{\text{T}}_{\text{1}}}}} = \frac{{{{\text{V}}_{\text{2}}}}}{{{{\text{T}}_{\text{2}}}}}$ …… (1)

Here,

${{\text{V}}_1}$ is the initial volume of gas.

${{\text{V}}_2}$ is the final volume of gas.

${{\text{T}}_1}$ is the initial temperature of the gas.

${{\text{T}}_2}$ is the final temperature of the gas.

Rearrange equation (1) to calculate ${{\text{V}}_2}$ .

${{\text{V}}_{\text{2}}} = \frac{{{{\text{V}}_{\text{1}}}{{\text{T}}_{\text{2}}}}}{{{{\text{T}}_{\text{1}}}}}$ …… (2)

The value of ${{\text{V}}_1}$ is 6 L.

The value of ${{\text{T}}_1}$ is 293 K.

The value of ${{\text{T}}_2}$ is 303 K.

Substitute these values in equation (2).

$\begin{aligned}{{\text{V}}_{\text{2}}}&=\frac{{\left({{\text{6 L}}}\right)\left( {{\text{303 K}}}\right)}}{{\left( {{\text{293 K}}}\right)}}\n&={\text{6}}{\text{.20477 L}}\n&\approx{\mathbf{6}}{\mathbf{.2 L}}\n\end{aligned}$

So option (2) is the correct answer.

Learn more:

1. Law of conservation of matter states: brainly.com/question/2190120

2. Calculation of volume of gas: brainly.com/question/3636135

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Ideal gas equation

Keywords: Charles’s law, volume, temperature, pressure, volume temperature relationship, absolute temperature, constant pressure, relationship, V directly proportional to T, ideal gas, ideal gas equation number of moles, moles, P, n, V, T, volume of gas, 6.2 L, 303 K, 293 K, 6 L.

The volume of the sample after the gas is heated to 303 K is 6.2 L

The correct answer to the question is Option (2) 6.2 L

From the question given above, the following data were obtained:

Initial volume (V₁) = 6 L

Initial temperature (T₁) = 293 K

Final temperature (T₂) = 303 K

Pressure = constant