Question

answer the questions.
. rows on the periodic table are called _.
columns on the periodic table are called _ or _.

1. there are —— periods on the periodic table.
2. there are—— groups on the periodic table.
3. lithium (li) is located at period _ group _.
4. which element is located at group 17 period 3?
5. the periodic table is organized by _.

. most of the elements on the periodic table are :
□solid □ liquid □ gas
. most of the elements on the periodic table are :
□metal □nonmetal □metalloid
. elements in the same group share _.
ii. label the diagram with vocabulary terms.

1. fill in the missing information.

element	chemical symbol	atomic number	atomic mass	protons	neutrons	electrons
nb
		14
			131.29
				87
					9

1. circle the chemical symbols that are correctly written for each element.

fr he sr w n po zn ba

1. the chemical symbol of all elements start with a _.
2. how many elements are in c₆h₁₂o₆?
3. how many atoms are in c₆h₁₂o₆?

Explanation:

1. Rows on the periodic table are called periods. This is a basic vocabulary term for the organization of elements.
2. Columns on the periodic table are called groups or families. They share similar chemical properties.
3. There are 7 periods on the periodic table, numbered from 1 - 7.
4. There are 18 groups on the periodic table, numbered from 1 - 18.
5. Lithium (Li) is in period 2 and group 1.
6. The element in group 17 and period 3 is Chlorine (Cl).
7. The periodic table is organized by increasing atomic number.
8. Most elements on the periodic table are solids at room - temperature.
9. Most elements on the periodic table are metals.
10. Elements in the same group share similar chemical properties due to having the same number of valence electrons.
11. For the table:

• Sodium has chemical symbol Na, atomic number 11, atomic mass approximately 22.99, 11 protons, 12 neutrons (23 - 11), 11 electrons.
• Nb is Niobium, atomic number 41, atomic mass approximately 92.91, 41 protons, 52 neutrons (93 - 41), 41 electrons.
• For atomic number 14, the element is Silicon (Si), atomic mass approximately 28.09, 14 protons, 14 neutrons (28 - 14), 14 electrons.
• For atomic mass 131.29, the element is Xenon (Xe), atomic number 54, 54 protons, 77 neutrons (131 - 54), 54 electrons.
• For 87 neutrons, assuming a common isotope, if we consider an element like Francium (Fr), atomic number 87, atomic mass approximately 223, 87 protons, 87 electrons.
• For 9 electrons, the element is Fluorine (F), atomic number 9, atomic mass approximately 19.00, 9 protons, 10 neutrons (19 - 9).

1. Correct chemical symbols are Fr, W, Zn. Chemical symbols start with a capital letter.
2. Chemical symbols of all elements start with a capital letter.
3. In \(C_6H_{12}O_6\), there are 3 elements (Carbon, Hydrogen, Oxygen).
4. In \(C_6H_{12}O_6\), there are \(6 + 12+6=24\) atoms.

Answer:

1. periods
2. groups; families
3. 7
4. 18
5. 2; 1
6. Chlorine (Cl)
7. increasing atomic number
8. Solid
9. Metal
10. similar chemical properties

11.

• Sodium: Na; 11; 22.99; 11; 12; 11
• Nb: Niobium; 41; 92.91; 41; 52; 41
• Atomic number 14: Si; 14; 28.09; 14; 14; 14
• Atomic mass 131.29: Xe; 54; 131.29; 54; 77; 54
• 87 neutrons: Fr; 87; 223; 87; 87; 87
• 9 electrons: F; 9; 19.00; 9; 10; 9

1. Fr, W, Zn
2. capital letter
3. 3
4. 24