Q.5: Complete the following:
1- The liquid element that composed of one atom is ------------------- while that composed of two atoms is ----------------------
2- ------------------- take the shape of the container, while ------------------ has no definite shape.
3- Hydrogen molecule is composed of ---------------------, while inert gas molecule is composed of ---------------------
4- Molecules are composed of small parts called ----------------------
5- Molecules of the matter are in ------------------ motion.
6- Table salt molecule is composed of --------------- atom and ------------- atom.
7- Changing of matter from solid state to liquid state is called ----------------, while changing it from liquid state to gaseous state is called ------------------
8- Water molecule is composed of ----------------- atoms with ------------ atom.
Q.6: Write the atomic components of the following molecules:
1- Sodium Chloride: --------------------------------------------------------------
2- Neon: ---------------------------------------------------------------------------
3- Copper: --------------------------------------------------------------------------
4- Nitrogen: ------------------------------------------------------------------------
5- Water: ---------------------------------------------------------------------------
6- Bromine: ------------------------------------------------------------------------
7- Mercury: ------------------------------------------------------------------------
8- Oxygen: -------------------------------------------------------------------------
Q.7: Which of the following molecules presents the Sodium Chloride and which presents water and which presents Oxygen molecules and why?
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Q.8: Compare between:
1- Element and Compound.
Element |
Compound |
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2- Melting and evaporation.
Melting |
Evaporation |
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3- Solid, liquid and gaseous materials from the attraction forces and the intermolecular spaces.
Point of Comparison |
Solid |
Liquid |
Gaseous |
The attraction forces |
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The intermolecular spaces |
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Q. 9: Complete:
Q.10: Mention an activity to Explain:
1-Matter is composed of molecules.
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2- Molecules of matter in a continuous motion.
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3- The presence of the intermolecular spaces between molecules.
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4- The presence of different attraction force between molecules.
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Lesson 3
Q
.1:
Write the scientific term:
1- Positive charged particles exist inside the nucleus.
[----------------------------]
2- Negative charged particles revolve around the nucleus.
[----------------------------]
3- Number of positive charges that found inside the nucleus.
[----------------------------]
4- The amount of energy gained or lost for the electron to transfer from an energy level to another. [----------------------------]
Q. 2: Give reason for each of the following:
1- Scientists use the symbols for the elements.
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2- The nucleus of the atom has a positive charge.
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3- The nucleus of the atom is concentrated in its nucleus.
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4- Mostly, the mass number is larger than the atomic number.
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5- The atom is electrically neutral in the normal state.
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6- The equation (2N2) is not applied for the levels higher than the 4th one.
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7- The energy level (M) is filled with (18) electrons.
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8- The energy level (K) is filled with electrons before the energy level (L).
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9- The atom (10Ne) can't share in the chemical reactions in the normal conditions.
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10- The atom (11Na) is chemically active.
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Q. 3: The following figures represent the electronic configuration for some elements:
Study these figures well then answer:
The atomic no. for each atom. ------------------------------------------------------
The mass no. for each atom. --------------------------------------------------------
The no. of electrons for the outer most energy level. ----------------------------
The no. of energy levels that filled with electrons. ------------------------------
No. of neutrons for each atom. -----------------------------------------------------
Q. 4: Choose the correct answer
1- The symbol of copper atom is -------------. [C - Cu - Ca]
2- The symbol of Sodium atom is -------------. [S - Si - Na]
3- The energy level that filled with (18) electrons is -------------. [K - L - M]
4- The energy level that has the most energy is -------------.
[(K) Level – (Q) level – (N) level]
5- The smallest individual unit of matter which can share in chemical reaction is -------------. [Molecule - atom - compound]
6- An element has atomic no. = 17 and mass no. = 35, the no. of its neutrons is = -------------. [11 - 35 - 18]
Q. 5: can you define me:
1- Atom: ----------------------------------------------------------------------------------.
2- Mass no.: ------------------------------------------------------------------------------.
3- Atomic no.:----------------------------------------------------------------------------.
4- Quantum: -----------------------------------------------------------------------------.
Q.6: Complete the following:
1- The nearest energy level to the nucleus is --------- and the farthest is --------.
2- The proton has ----------- charged, while the electron has ----------- charged.
3- The no. of electrons that saturates energy level can be calculated by the relation------------------------.
4- The outer energy level of the nucleus can't carry more than --------------- or --------------- by electron to travel from level to anther.
5- Quantum is the amount of energy that ---------------- or --------------- by the electron to travel to another.
6- The symbol of the Calcium is ------------- and Copper is -------------.
7- Mass no. = ---------------- + -----------------.
8- Atomic no. is the number of ---------------- that exist inside the nucleus of the atom or the no. of -------------- that revolve around the nucleus.
9- Number of the neutrons = ------------------ ـــ -------------------