1.
Who created the Periodic table?
Correct Answer
B. Dimitri Mendeleev
Explanation
Dimitri Mendeleev is credited with creating the Periodic table. He was a Russian chemist who organized the elements based on their atomic mass and properties, and predicted the existence and properties of undiscovered elements. Mendeleev's Periodic table laid the foundation for our modern understanding of the elements and their relationships, and it is still widely used today.
2.
The Periodic Table was created in the year 1886. True or False
Correct Answer
B. False
Explanation
The Periodic Table was not created in the year 1886. It was actually created by Dmitri Mendeleev in 1869. He organized the elements based on their atomic mass and properties, creating a table that allowed for the prediction of the properties of undiscovered elements. This table has since been revised and expanded, but its foundation was laid in 1869, not 1886.
3.
In order the first ten elements on the Periodic Table are Hydrogen, Helium, Lithium, Beryllium, Boron, ______, Nitrogen, Oxygen, Fluorine and Neon
Correct Answer
Carbon
carbon
Explanation
The missing element in the sequence is carbon. Carbon is the sixth element on the periodic table and comes after boron. It is a nonmetal with atomic number 6 and is known for its ability to form a wide variety of compounds due to its unique bonding properties. Carbon is essential for life and is found in all living organisms.
4.
Darmstadtium was recently created in 1990. True or False.
Correct Answer
A. True
Explanation
Darmstadtium, a synthetic chemical element with the symbol Ds and atomic number 110, was indeed created in 1994 by a team of German scientists at the Institute for Heavy Ion Research in Darmstadt, Germany. Therefore, the statement "Darmstadtium was recently created in 1990" is true.
5.
How many groups are in the Periodic Table?
Correct Answer
B. 13
Explanation
The Periodic Table consists of 18 groups, each representing a specific category of elements with similar properties. The answer of 13 is incorrect, as it does not align with the actual number of groups in the Periodic Table.
6.
How many letters in the name The Periodic Table
Correct Answer
D. 16
Explanation
The correct answer is 16 because the name "The Periodic Table" consists of 16 letters.
7.
Which of the following elements are radioactive?
Correct Answer(s)
A. Plutonium
B. Radon
E. Einsteinium
Explanation
Plutonium, Radon, and Einsteinium are radioactive elements. Plutonium is a highly toxic and radioactive element commonly used in nuclear reactors and weapons. Radon is a naturally occurring radioactive gas that can be found in homes and is a leading cause of lung cancer. Einsteinium is a synthetic radioactive element that is produced in nuclear reactors and has no known uses outside of scientific research. Zinc, Osmium, and Krypton are not radioactive elements.
8.
The noble gases in order are Helium, Neon, _____, Krypton, Xenon, Radon.
Correct Answer(s)
Argon
argon
Explanation
The correct answer is Argon or argon. Argon is the missing noble gas in the given sequence. The noble gases in order are Helium, Neon, Argon, Krypton, Xenon, and Radon. Argon is a colorless and odorless gas that is commonly found in the Earth's atmosphere. It is known for its inertness and is used in various applications such as in lighting, welding, and as a protective gas in the production of metals.
9.
Which of the following has its own category?
Correct Answer
A. Hydrogen
Explanation
Hydrogen has its own category because it is the lightest and simplest element on the periodic table. It is unique in that it does not fit into any specific group or family of elements. While the other elements listed (helium, plutonium, and carbon) belong to specific groups, hydrogen stands alone as its own category.
10.
What element cannot make a bomb?
Correct Answer
C. Helium
Explanation
Helium cannot make a bomb because it is an inert gas and does not have the necessary properties to sustain a nuclear chain reaction. Plutonium and uranium, on the other hand, are both highly radioactive elements that can be used as fuel in nuclear reactors or weapons.
11.
Which of the following is not a poison?
Correct Answer
D. Beryllium
Explanation
Beryllium is not a poison because it is a naturally occurring element that is essential for various industries and has many useful applications. While it can be harmful if inhaled in dust or fume form, it is not considered a poison in the same way as lead, arsenic, and curium, which are known to be toxic and can cause severe health issues if ingested or exposed to in high amounts.
12.
Which of the following was not once used for paint?
Correct Answer
C. Zinc
Explanation
Zinc was not once used for paint because it does not possess the necessary properties to be used as a pigment. Unlike iron, carbon, and lead, zinc does not have a natural color that can be used to create paint. Zinc is often used as a coating or protective layer for other metals, but it is not suitable for use as a pigment in paint.
13.
What element is used to make Australian coins?
Explanation
Australian coins are made primarily from copper. Copper is a commonly used metal for coin production due to its durability, malleability, and resistance to corrosion. It is a cost-effective material that allows for the production of coins in large quantities. While aluminium and tungsten are also used in various industries, they are not commonly used in the production of Australian coins.
14.
What metal is used in the Mars rover?
Correct Answer
D. Gallium
Explanation
Gallium is used in the Mars rover because it has a low melting point and can be easily liquefied and manipulated. This property is crucial for the functioning of certain components in the rover, such as the thrusters and valves. Additionally, gallium is resistant to corrosion and can withstand the harsh conditions on Mars, making it a suitable choice for the rover's construction.
15.
Is Thortacton a real element?
Correct Answer
B. False
Explanation
Thortacton is not a real element. It is not found on the periodic table or recognized by any scientific authority. The answer is false because there is no evidence or information to support the existence of Thortacton as a real element.