Student Exploration: Element Builder

Directions: Follow the instructions to go via the simulation. Respond to the questions andprompts in the ovariety boxes.

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Vocabulary: atom, atomic number, electron, electron dot diagram, facet, power level, ion, isotope, massnumber, neutron, nucleus, regular table, proton, radioactive, valence electrons

Prior Knowledge Questions (Do these BEFORE making use of the Gizmo.)

What are some of the different substances that comprise a pizza?

Pizza dough, tomato sauce, cheese, optionaltoppings.

What substances comprise water? Hydrogen, Oxygen.

What substances consist of an iron pot? Iron

Elements are pure substances that are made up of one sort of atom. Pizza is not an aspect because it is amixture of many substances. Water is a pure substance, however it contains two kinds of atom: oxygen andhydrogen. Iron is an element because it is composed of one kind of atom.

Gizmo Warm-upAtoms are tiny particles of issue that are made up of three particles:protons , neutrons , and electrons. The Element Builder Gizmo showsan atom with a single proton. The proton is situated in the center of theatom, called the nucleus.

Use the arrowhead butlots ( ) to include protons, neutrons, and also electrons to the atom. Press Play ( ).

A. Which pshort articles are located in the nucleus?

The neutrons

B. Which pposts orbit about the nucleus?

The electrons

C. Turn on Sjust how element name. What causes the element name to change?

The number of protons

Activity A:

Subatomicparticles

Get the Gizmo ready: ●Use the arrows to create an atom through 2 protons, two neutrons, and also two electrons. ●Turn on Sjust how element name.

Question: What are the properties of proloads, neutrons, and electrons?

Observe : Turn on Sjust how aspect symbol and also Element notation. Three numbers surround the aspect symbol: the mass number ( A ), electric charge (no number is shown if the atom is neutral), and also the atomic number ( Z ).

Investigate : Watch how the numbers change as you add or remove parti cles.

A. Which number is equal to the variety of proloads in the atom? The atomic number.

B. How can you calculate the variety of neutrons ( N ) in an atom? The mass number subtracted by the atomic number.

C. Which ppost (proton, neutron, or electron) has actually a

Confident charge? Neutrons

Negative charge? Electrons

No charge at all? Protons

Analyze : An isotope is an alternative create of an aspect. Each isotope of an facet has the same variety of protons, however a different variety of neutrons. The isotope is stood for by the atomic symbol and also mass number, such as He-4. Some isotopes are steady, while others are radioactive , which implies the atoms decay over time and also emit radiation.

A. What are the stable isotopes of carbon? Carbon-13, Carbon-12, Isotopes of nitrogen, Carbon-14, Oxygen-18, Deuterium, nitrogen-15, oxygen-16, nitrogen-

B. What are the stable isotopes of nitrogen? nitrogen-15, carbon-14, nitrogen-14.

C. List 2 radioenergetic isotopes of oxygen: Diproton, Hydrogen-

Practice : Use the Gizmo to answer the complying with concerns.

A. How many kind of electrons are in a neutral atom of lithium? 0

B. How many neutrons are in an atom of Mg-25?

C. What is the mass variety of an atom with 5 protons and also 7 neutrons? 12

D. When an atom is charged, it is referred to as an ion. How many electrons are in O 2-? 10

Explain:

Extension:

The routine table

Get the Gizmo ready: ●Create a neutral hydrogen atom. ●If you have access to a periodic table, open up it now. (Not compelled.)

Question: The 117 or so recognized aspects are arranged in the regular table. Why does the periodictable have the shape it has?

Form a hypothesis : Look at the first three rows of the periodic table below.

Why do you think the facets are arranged the way that they are?

I think they are arranged favor that because of the numbers on peak of the aspects. 1 is onthe left finish, 18 is on the ideal end.

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✏️Draw diagrams: Either hand attract in the area listed below or modify using the illustration tool to develop an electron dot diagram for each of the elements listed below. Use the Gizmo to aid you do this. To inspect your job-related, revolve on Sexactly how electron dot diagram. (Right Click on the photo, click “edit”, move the dots a✏️ round the element symbols)

Analyze : What perform the aspects in each column of the periodic table have actually in common?

They have actually the very same amount of valence electrons.

Draw conclusions : How is the regular table organized?

The regular table is arranged by placing the same amount of valence electrons in each