Fill in the gaps in the following table, assuming each column represents a neutral atom.

Name: Problem 30, Chapter 2: Chemistry The Central Science
Uploaded: 2019-05-29T15:52:38-08:00
Duration: 4 min 2 s
Channel: James Irizarry
Description: Fill in the gaps in the following table, assuming each column represents a neutral atom.

Fill in the gaps in the following table, assuming each...

Key Concepts

Atomic Structure

Atomic structure refers to the arrangement of subatomic particles within an atom, including protons, neutrons, and electrons. In a neutral atom, the number of protons (positively charged) is equal to the number of electrons (negatively charged), maintaining overall electrical neutrality. This concept is fundamental for understanding how atoms form elements and interact in chemical reactions.

Atomic Number

The atomic number is the number of protons in the nucleus of an atom and, for a neutral atom, also equals the number of electrons. It defines the identity of an element and determines its position in the periodic table, serving as a key identifier when comparing different atoms.

Electron Configuration

Electron configuration describes the distribution of electrons in an atom's orbitals. It follows specific rules, such as the Aufbau principle, Pauli exclusion principle, and Hund's rule, and is essential for predicting an element's chemical behavior, bonding characteristics, and placement in the periodic table.

Periodic Table Trends

Periodic table trends refer to the recurring patterns observed in the properties of elements as one moves across periods and down groups. These trends, which include variations in electronegativity, ionization energy, and atomic radius, help in understanding and predicting the chemical and physical behaviors of different elements.

Transcript

00:01 All right, guys, we're doing problem number 30 of chapter two in chemistry and central science.

00:06 They want to fill the gaps in this table.

00:09 So, first of all, we have the second and fifth column.

00:13 We know the number of protons.

00:14 So that means we know the number of electrons.

00:22 So let's go to pyrrhic table.

00:26 Element number 30, with atomic number 38, that is strontium.

00:36 It is trontium.

00:40 We have a...

00:46 The mass number, we add the number of protons to the to us.

00:57 We add to do us, we add the number of protons to the number of neutrons, and that's going to give us our atomic number.

01:10 Sorry, our mass, sorry, not our atomic number.

01:15 It will give us our mass number.

01:17 So 38, 8 plus 58, that's going to be 96, which i actually think there's a typo in the book that, i'm pretty sure that should be 48 in the book because that's closer to the actual molecular weight of strontium.

01:37 Then we mass, so 96, so cadmium atomic number, that is 48.

01:50 That's what's going to be number of electrons.

01:52 In group four we have row in these two columns we have number of electrons so we can find number of protons so if you look at 38 that is going oh my my apologies but never mind i thought i wrote something incorrectly actually yes everything is fine so this is also strontium and this is going to be the krypton so we look at the mass number, we add number of protons, number of neutrons.

02:45 So 38 plus 49, that's going to be be 87...

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