Complete the following table for a neutral atom of each...

Complete the following table for a neutral atom of each element: $$\begin{array}{|c|c|c|c|c|c|c|} \hline \begin{array}{} \text { Name } \\ \text { of the } \\ \text { Element } \end{array} & \text { Symbol } & \begin{array}{} \text { Atomic } \\ \text { Number } \end{array} & \begin{array}{l} \text { Mass } \\ \text { Number } \end{array} & \begin{array}{l} \text { Number } \\ \text { of } \\ \text { Protons } \end{array} & \begin{array}{l} \text { Number } \\ \text { of } \\ \text { Neutrons } \end{array} & \begin{array}{l} \text { Number } \\ \text { of } \\ \text { Electrons } \end{array} \\ \hline & \text { N } & & 15 & & & \\ \hline \text { Calcium } & & & 42 & & \\ \hline & & & & 38 & 50 & \\ \hline & & 14 & & &16 & \\ \hline & & 56 & 138 & & & \\ \hline \end{array}$$

Complete the following table for a neutral atom of each element:
$$\begin{array}{|c|c|c|c|c|c|c|}
\hline \begin{array}{}
\text { Name } \\
\text { of the } \\
\text { Element }
\end{array} & \text { Symbol } & \begin{array}{}
\text { Atomic } \\
\text { Number }
\end{array} & \begin{array}{l}
\text { Mass } \\
\text { Number }
\end{array} & \begin{array}{l}
\text { Number } \\
\text { of } \\
\text { Protons }
\end{array} & \begin{array}{l}
\text { Number } \\
\text { of } \\
\text { Neutrons }
\end{array} & \begin{array}{l}
\text { Number } \\
\text { of } \\
\text { Electrons }
\end{array} \\
\hline & \text { N } & & 15 & & & \\
\hline \text { Calcium } & & & 42 & & \\
\hline & & & & 38 & 50 & \\
\hline & & 14 & & &16 & \\
\hline & & 56 & 138 & & & \\
\hline
\end{array}$$

Key Concepts

Isotopes

Isotopes are variants of a particular chemical element that differ in neutron number while having the same number of protons. This difference in neutrons leads to variations in mass number but does not change the element's chemical properties.

Neutral Atom

A neutral atom has an equal number of protons and electrons, ensuring that the positive charge of the nucleus is balanced by the negative charge of the electrons. This balance is crucial for the atom to have no overall electric charge.

Subatomic Particles

Subatomic particles include protons, neutrons, and electrons. Protons and neutrons reside in the nucleus and contribute to the mass of an atom, while electrons orbit the nucleus and determine the atom’s reactivity and bonding characteristics.

Atomic Number

The atomic number is a fundamental property of an element that indicates the number of protons in the nucleus of an atom. It uniquely defines an element and determines its chemical behavior and placement in the periodic table.

Mass Number

The mass number is the total count of protons and neutrons in the nucleus of an atom. It is used to distinguish between different isotopes of the same element, which have the same atomic number but different numbers of neutrons.

Transcript

00:02 All right, so this question is asking us to complete the table.

00:07 And we've been given some information to start.

00:09 And you can see that i've redrawn this table.

00:11 I've color -coded it based on the order that we're going to do this.

00:13 We're going to start with the reds.

00:15 Then we're going to move to the yellows and then the blues.

00:20 But to start with, obviously, you're going to have to get out your periodic table.

00:24 You're going to have to redraw this table.

00:26 So make sure that's ready to go.

00:27 I put it in excel, so we make sure it's easy to read because it's going to be a fair amount of writing.

00:33 But let's go ahead and begin.

00:36 So the reason that i highlighted these three first in red is because those three columns all have to have the same numbers in them.

00:49 And the reason that they have to have the same numbers is because the atomic number is defined as the number of protons.

00:55 So definitely those have to be the same.

00:57 And the number of electrons has to be the same as a number of protons because it is a neutral atom.

01:02 So in order to get the positives and the negatives to cancel each other out, those have to be the same as well.

01:08 So to start off with, we can immediately fill in, even without looking at our periodic table, we can fill in our 13, our 38 or 14, and our 56 here, and also here.

01:24 Now, to get the rest of them, we do need to look at the periodic table.

01:27 We need to find calcium, and we need to find n.

01:32 And so we'll start with n.

01:34 N we can find near the upper right, and we can find the atomic number of n is 7.

01:40 So if that's 7, then of course this is 7, and this is 7 as well.

01:43 Make sure you're looking at the upper left corner of the square to find the atomic number.

01:49 So in the upper right part of the periodic table, you'll find n in the upper left corner of that square.

01:55 You'll see the number 7.

01:57 For calcium, calcium's near the left.

01:59 It's the second column in about the 4 .4.

02:03 Fourth row down might only be the third row.

02:04 I don't remember exactly.