1.
Element 1
Explanation
Hydrogen is the correct answer because it is mentioned as "Element 1".
2.
Element 2
Explanation
Helium is a noble gas, and it is the second element on the periodic table. It is colorless, odorless, tasteless, and non-toxic. Helium is known for being the second lightest and second most abundant element in the universe. It has a complete outer electron shell, making it chemically inert and non-reactive. Helium is commonly used in applications like balloons, cryogenics, and as a protective gas in various industries.
3.
Element 3
4.
Element 4
Explanation
The given information states "Element 4" and "Beryllium," indicating that Beryllium is the correct answer.
5.
Element 5
Explanation
Boron is a chemical element with the symbol B and atomic number 5. It is a metalloid and is found in nature primarily as borates. Boron is known for its unique chemical properties and is used in various applications, such as in the production of glass, ceramics, and as a dopant in semiconductors. It is also an essential nutrient for plants and animals. Therefore, the correct answer for this question is Boron.
6.
Element 6
Explanation
Carbon is the correct answer because it is the element with atomic number 6. It is a nonmetal and is known for its ability to form a wide variety of compounds due to its unique bonding properties. Carbon is essential for life as it is a key component of organic molecules, including carbohydrates, proteins, and nucleic acids. It is also found in various forms such as graphite and diamond, and has numerous industrial applications, including as a fuel source and in the production of steel and plastics.
7.
Element 7
8.
Element 8
9.
Element 9
Explanation
Fluorine is a highly reactive, pale yellow gas at room temperature. It is the most electronegative and reactive of all the elements, making it extremely powerful in forming compounds with most other elements. Fluorine is commonly used in the production of fluorinated compounds like Teflon, and in the fluoridation of drinking water to help prevent tooth decay. It also plays a role in various industrial applications.
10.
Element 10
11.
The symbol for Nitrogen is Ng
Correct Answer
B. False
Explanation
The symbol for Nitrogen is not Ng. The correct symbol for Nitrogen is N.
12.
The symbol for Boron is B
Correct Answer
A. True
Explanation
Boron is a chemical element with the symbol B. It is a metalloid that is commonly found in nature and is known for its various applications in industries. The symbol B is internationally recognized and used to represent Boron in the periodic table and chemical equations. Therefore, the statement "The symbol for Boron is B" is true.
13.
The symbol of Beryllium is B
Correct Answer
B. False
Explanation
The symbol of Beryllium is Be, not B. The symbol for an element is a shorthand way of representing its name. In the case of Beryllium, its symbol is derived from the first two letters of its name, Be. Therefore, the correct answer is False.
14.
The symbol for Helium is H
Correct Answer
B. False
Explanation
The symbol for Helium is actually He, not H. The symbol H represents Hydrogen, not Helium.
15.
If a compound is said to be an organic compound it contains the element ________________.
Correct Answer
A. Carbon
Explanation
An organic compound is defined as a compound that contains carbon atoms. Carbon is the central element in organic chemistry as it has the unique ability to form covalent bonds with other carbon atoms, allowing for the formation of complex and diverse molecules. Therefore, if a compound is classified as organic, it must contain carbon.
16.
Which of the following is the most reactive element?
Correct Answer
D. Hydrogen
Explanation
Hydrogen is the most reactive element because it has only one electron in its outermost shell, making it highly unstable and eager to bond with other elements. This electron configuration allows hydrogen to easily gain, lose, or share electrons to achieve a stable state, resulting in its high reactivity. In contrast, helium and neon have full outer electron shells, making them stable and less likely to react with other elements. Fluorine is also highly reactive, but hydrogen surpasses it in reactivity due to its unique electron configuration.
17.
The symbol for Hydrogen is H
Correct Answer
A. True
Explanation
The symbol for Hydrogen is indeed H. In the periodic table, elements are represented by symbols, and H is the symbol for Hydrogen.
18.
Which of the following is the smallest Noble Gas?
Correct Answer
B. Helium
Explanation
Helium is the smallest noble gas because it has the fewest number of electrons and protons in its atomic structure. It consists of only two electrons and two protons, making it the lightest and smallest noble gas. In comparison, neon and argon have more electrons and protons, and hydrogen is not considered a noble gas.