Chapter 2.1 Atoms, Ions and Molecules pgs 34-39

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Class Period: A1 A2 A4 A5 A6 A7 A8

Fill in the missing words on the 5 Principles of the Atomic Theory:

1. Every element is made of ___________ (5 letter word - not capitalized, must be spelled correctly to receive credit)

Fill in the missing words on the 5 Principles of the Atomic Theory:

2. All atoms of any element are the _____ (4 letter word - not capitalized, must be spelled correctly to receive credit)

Fill in the missing words on the 5 Principles of the Atomic Theory:

3. Atoms of different elements can combine to form ___________ (9 letter word - not capitalized, must be spelled correctly to receive credit)

Fill in the missing words on the 5 Principles of the Atomic Theory:

4. _______ are not made, destroyed, or changed in chemical reactions (5 letter word - not capitalized, must be spelled correctly to receive credit)

Fill in the missing words on the 5 Principles of the Atomic Theory:

5. The number and kinds of _______ remain the _____ in a compound. (5 letter word/4 letter word - put one space between the two words, not capitalized, must be spelled correctly to receive credit)

Use the above Venn diagram to answer the question, "Is an "atom" (B) part of an "element" (A) or is an "element" (B) part of an "atom"? Match up the word "atom" and "element" to show their relationship.

A= __________and B=______________ (type word correctly with only one space between each to receive credit, do not capitalize)

Rutherford is given credit for discovering the nucleus of an atom. The nucleus is composed of

Protons have a ______________charge.

Neutrons have a ______________charge.

Thompson was given credit for discoving electrons inside an atom. Electrons have a ______________charge.

An element is an element based on the number of _________________.

Discovered by Chadwick, neutrons usually are equal in number with the number of ______________in an atom.

In comparison with the size of protons and neutrons, electrons are

Electrons are located outside the nucleus in orbitals called shells.

The first obital/shell of an atom can hold up to _____________electrons.

The second obital of an atom can hold up to _____________electrons.

The number of valence electrons determines the

If needed, refer to a Periodic Table to help you with this question. How many more electrons could fit in the 2nd orbital shell of oxygen?

An atom is most stable when its outer shell only has half the valence electrons in it.

96% of the human body consists of these four elements:

The remaining 4% of a human's body consists of these seven elements:

Practice reading a Periodic Table. Hydrogen's atomic symbol is H, atomic mass is 1.008, atomic number 1, # of protons 1, # of neutrons 0, # of electrons 1, and is located in Group 1, Period 1.

Practice reading a Periodic Table. Helium's atomic symbol is He, atomic mass is 4.0026, atomic number 2, # of protons 2, # of neutrons 2, # of electrons 2, and is located in Group 13, Period 1.

Practice reading a Periodic Table. Neon's atomic symbol is Ne, atomic mass is 20.180, atomic number 10 meaning that Neon has the exact same number of 10 protons, 10 neutrons, and 10 electrons. Neon is located in Group 2, Period 2.

Practice reading a Periodic Table. Iron's atomic symbol is Fe and its atomic mass is 26 meaning that it has 26 protons, 26 neutrons, and 26 electrons.

Practice reading a Periodic Table. Sodium's atomic symbol is S and its atomic number is 11. It is located in Group 1 and Period 3.

Practice reading a Periodic Table. Carbon - the element of life - has an atomic symbol C, atomic mass 12.011, and atomic number 6. It has 4 empty spaces in its valence electron shell. It is located in Group 14, Period 2.

Practice reading a Periodic Table. Columns on the periodic table tell you how many valence electrons are in the outer shell of the element. Group 18, also known as the Nobel Gases, all have ________________

Practice reading a Periodic Table. The rows, called periods, tells you that all the elements on that row have the same number of shells. All the elements on the same row as Carbon have 2 shells.

Select the correct word that matches this definition:

atoms held together by covalent bonds, sharing a pair of electrons

Select the correct word that matches this definition:

composed of the same type of atoms

Select the correct word that matches this definition:

an atom that has gained or lost at least one electron

Select the correct word that matches this definition:

composed of at least two different types of atoms

If an atom has lost an electron, then it has an extra __________________making the ion _____________ because the numbers of electrons and protons aren't equal anymore.

If an atom has gained an electron, then it has an extra __________________making the ion _____________ because the numbers of electrons and protons aren't equal anymore.

Mg+4 would indicate that magnesium has lost 4 electrons.

Cl- would indicate that chlorine has gained one extra electron.

What are the three examples of molecules used to show covalent bonding?

How many electrons end up in the outer shells of these examples of covalent bonding?

Which of the three molecules are also compound(s)?

At the same animation there is also an example of ionic bonding. What is the common household compound used as an example of ionic bonding?

When an element loses an electron, the element becomes a _______________ion

When an element gaines an electron, the element becomes a _______________ion

Negative and positive ions are attracted to each other and consequently work well as mediums for conducting electricity.