Question

Chemistry, Nutrition, and Digestion UNIT 2 COOPERATIVE HOMEWORK ASSIGNMENT #1 (10 points) Questions are worth 1/2 point each unless marked otherwise Names of Group Members (list names in ALPHABETICAL ORDER) (recall) Fill in the blank with the most appropriate term. The negatively charged particles of an atom are called The positively charged particles of an atom are called How a substance will react with other chemicals is determined by the number of electrons in its An ionic compound that absorbs hydrogen ions (H') in a solution is called a/an In which type of chemical bond are the electrons completely transferred from one atom to another In this type of chemical bond, atoms share electrons, but the resulting molecules have no positive or negative charges. Choose the most appropriate answer. (recall) A positive ion: d. has an equal number of protons and electrons is sharing electrons with another ion a. b. c. has gained electrons has lost electrons has gained protons e (application) The half life of '"1 iodine 131) is eight days. If you had 12 grams of '', how long would it take for the 12 grams to decay to 3 grams? 8 days 8 minutes 16 hours d. e. 16 days 32 days b. c. (comprehension) The lower the pH: a b. the greater the number of hydrogen ions released the more acidic the solution the lower the number on the pH scale all of the above (a-c) are correct only a and b above are correct d. Human Biology: Condensed ©2019 Education Resour

Answer 1

1. The negativily charged particle of atom is the electron.
2. The positively charged particle of atom is the proton.
3. The reactivity to the other chemicals is determined by the electrons in the outermost shell they are also called valence electrons.
4. An ionic compound that absorbs hydrogen ion is called as base ( it releases hydroxyl ions).
5. The bond in which the complete transfer of electron takes place is the ionic bond ( it is the strong bond which is formed by a negative ion and a positive ion).
6. The sharing of the electrons takes place between two atoms but the resultant have no net charge is known as the covalent bonding.

7.
The answer is option B.
When the atom loses an electron it is foms as the positively charge. The atom with a positive charge on it is called as cation.
When it gains an electron it is known as anion which has negative charge.
All other options are incorrect.

8.
Half life of iodine is 8 days. Given is 12 gm
So 12 gm to 6 gm is 8 days.
6 gm to 3 gm is 16 days.

Thus the answer is option D.

9.
The answer is option D.
The acid is that substance which can donate hydrogen ions.
The lower the pH more acidic is the solution is that it is below the value As it goes down it becomes more acidic.
The acidic pH have lower value on the pH scale...

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