NEET mcqs on Classification of Elements and periodicity in properties
The classification of elements and the periodicity of their properties are important because they allow us to:
Thank you for reading this post, don't forget to subscribe!- Understand the relationship between the structure of an atom and its properties. The periodic table is arranged so that elements with similar chemical properties are grouped together. This is because the chemical properties of an element are determined by the number and arrangement of electrons in its outermost shell.
- Predict the properties of new elements. The periodic table can be used to predict the properties of new elements that have not yet been discovered. This is because the properties of an element are periodic functions of its atomic number.
- Simplify the study of chemistry. The periodic table allows us to organize and simplify the study of chemistry. This is because we can group together elements with similar properties and study them together.
- Identify trends in the properties of elements. The periodic table allows us to identify trends in the properties of elements. This is because the properties of an element change in a regular way as its atomic number increases.
- Make new discoveries. The periodic table has helped scientists to make new discoveries in chemistry. For example, the periodic table led to the prediction of the existence of the noble gases, which were later discovered.
Overall, the classification of elements and the periodicity of their properties are essential tools for understanding and studying chemistry.
Here are some multiple-choice questions (MCQs) on the classification of elements and periodicity in properties for NEET (National Eligibility cum Entrance Test) preparation, along with their answers:
1. In the modern periodic table, elements are arranged in order of increasing:
a) Atomic number
b) Atomic mass
c) Valence electrons
d) Neutron count
Answer: a) Atomic number
2. The periodic table is divided into how many periods and groups, respectively?
a) 8 periods, 18 groups
b) 7 periods, 18 groups
c) 18 periods, 7 groups
d) 18 periods, 18 groups
Answer: b) 7 periods, 18 groups
3. Which element is found at the top of Group 17 (Group VIIA) in the periodic table?
a) Oxygen (O)
b) Fluorine (F)
c) Chlorine (Cl)
d) Bromine (Br)
Answer: b) Fluorine (F)
4. The atomic radius of an element tends to increase as you move:
a) Down a group and from right to left across a period
b) Down a group and from left to right across a period
c) Up a group and from right to left across a period
d) Up a group and from left to right across a period
Answer: a) Down a group and from right to left across a period
5. Which of the following elements is a noble gas?
a) Sodium (Na)
b) Oxygen (O)
c) Neon (Ne)
d) Chlorine (Cl)
Answer: c) Neon (Ne)
6. Elements in the same group of the periodic table have:
a) The same number of valence electrons
b) The same atomic number
c) Similar chemical properties
d) The same atomic mass
Answer: a) The same number of valence electrons
7. The first ionization energy of an element generally:
a) Decreases as you move down a group
b) Increases as you move down a group
c) Decreases as you move across a period from left to right
d) Increases as you move across a period from left to right
Answer: d) Increases as you move across a period from left to right
8. The element with atomic number 6 belongs to which group in the periodic table?
a) Group 2 (IIA)
b) Group 14 (IVA)
c) Group 6 (VIA)
d) Group 16 (VIA)
Answer: b) Group 14 (IVA)
9. Which element has the highest electronegativity?
a) Hydrogen (H)
b) Carbon (C)
c) Fluorine (F)
d) Sodium (Na)
Answer: c) Fluorine (F)
10. Which group of elements is known as the “alkali metals”?
a) Group 1 (IA)
b) Group 2 (IIA)
c) Group 17 (VIIA)
d) Group 18 (VIII)
Answer: a) Group 1 (IA)
These questions should help you practice and prepare for the classification of elements and periodicity in properties topic in the NEET examination.
JEE mcqs on classification of elements and periodicity in properties
Certainly! Here are some multiple-choice questions (MCQs) on the classification of elements and periodicity in properties for JEE (Joint Entrance Examination) preparation, along with their answers:
1. Which of the following elements belongs to the halogen group in the periodic table?
a) Sodium (Na)
b) Chlorine (Cl)
c) Calcium (Ca)
d) Iron (Fe)
Answer: b) Chlorine (Cl)
2. In the modern periodic table, elements are arranged in order of increasing:
a) Atomic mass
b) Atomic number
c) Electronegativity
d) Ionization energy
Answer: b) Atomic number
3. Which element has the highest electronegativity among the following?
a) Sodium (Na)
b) Fluorine (F)
c) Potassium (K)
d) Oxygen (O)
Answer: b) Fluorine (F)
4. Elements in the same group of the periodic table have the same number of:
a) Electrons in the outermost shell
b) Protons in the nucleus
c) Neutrons in the nucleus
d) Electrons in the innermost shell
Answer: a) Electrons in the outermost shell
5. Which of the following elements is a noble gas?
a) Oxygen (O)
b) Nitrogen (N)
c) Helium (He)
d) Carbon (C)
Answer: c) Helium (He)
6. The element with the highest atomic radius in a period is found in which group of the periodic table?
a) Alkali metals
b) Alkaline earth metals
c) Halogens
d) Noble gases
Answer: a) Alkali metals
7. Which of the following properties generally increases across a period in the periodic table?
a) Atomic radius
b) Electronegativity
c) Ionization energy
d) Metallic character
Answer: b) Electronegativity
8. The element with the lowest ionization energy is found in which group of the periodic table?
a) Alkali metals
b) Alkaline earth metals
c) Halogens
d) Noble gases
Answer: a) Alkali metals
9. Which of the following elements is a metalloid?
a) Sodium (Na)
b) Silicon (Si)
c) Chlorine (Cl)
d) Sulfur (S)
Answer: b) Silicon (Si)
10. The first ionization energy of an element is the energy required to:
a) Remove the first electron from a neutral atom
b) Add an electron to a neutral atom
c) Remove all electrons from a neutral atom
d) Create a cation from a neutral atom
Answer: a) Remove the first electron from a neutral atom
These questions should help you practice and prepare for the classification of elements and periodicity in properties topic in the JEE examination.
Here are some specific examples of how the periodic table is used in chemistry:
- The periodic table is used to identify the elements that are most likely to react with each other. For example, the alkali metals are very reactive and are likely to react with other elements, while the noble gases are very unreactive and are unlikely to react with other elements.
- The periodic table is used to predict the properties of new elements. For example, the element francium was predicted to be a highly reactive metal, and this prediction was later confirmed when francium was discovered.
- The periodic table is used to simplify the study of chemistry. For example, the elements can be grouped together based on their properties, such as their reactivity or their electronegativity. This makes it easier to study the properties of each group of elements.
- The periodic table is used to identify trends in the properties of elements. For example, the atomic radius of an element decreases as its atomic number increases. This trend can be explained by the fact that the nuclear charge of an atom increases as its atomic number increases.
- The periodic table is used to make new discoveries. For example, the periodic table led to the prediction of the existence of the noble gases, which were later discovered.
The periodic table is a powerful tool that has helped chemists to understand and study the elements. It is an essential tool for anyone who wants to learn about chemistry.
NEET mcqs on classification of elements and periodicity in properties
NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties NEET mcqs on classification of elements and periodicity in properties
JEE mcqs on classification of elements and periodicity in properties
JEE mcqs on classification of elements and periodicity in properties JEE mcqs on classification of elements and periodicity in properties JEE mcqs on classification of elements and periodicity in properties JEE mcqs on classification of elements and periodicity in properties JEE mcqs on classification of elements and periodicity in properties JEE mcqs on classification of elements and periodicity in properties JEE mcqs on classification of elements and periodicity in properties JEE mcqs on classification of elements and periodicity in properties JEE mcqs on classification of elements and periodicity in properties