David Bangaru

  The periodic table of elements  The periodic table of elements is a tabular arrangement of chemical elements based on their atomic number, electron configuration, and recurring chemical properties.  It provides a systematic way of organizing and displaying all known elements. The elements in the periodic table are arranged in order of increasing atomic number, from left to right and top to bottom . Each element is represented by its atomic symbol, which is a one or two-letter abbreviation derived from its name. For example, hydrogen is represented by "H," carbon by "C," and oxygen by "O." The periodic table is divided into several sections: Periods : Horizontal rows in the table are called periods . There are seven periods in total, numbered from 1 to 7. Each period represents a different electron shell or energy level in which the electrons of the elements reside. Groups or Families : Vertical columns in the table are known as groups or families. There

 Structure of an Atom The atom is the basic building block of matter. It is composed of three main subatomic particles: protons, neutrons, and electrons. Protons : Protons are positively charged particles found in the nucleus (central core) of an atom. Each proton carries a positive charge of +1 and has a mass of approximately 1 atomic mass unit (amu). Neutrons : Neutrons are neutral particles also located in the nucleus of an atom. They do not carry any charge, hence the name "neutron." Neutrons have a mass similar to protons, approximately 1 amu. Electrons : Electrons are negatively charged particles that orbit around the nucleus in specific energy levels called electron shells or orbitals. Electrons have a negligible mass compared to protons and neutrons. Each electron carries a negative charge of -1. The number of protons determines the identity of an atom. It defines its atomic number .  For example, an atom with one proton is hydrogen,  while an atom with six protons is

Unleashing the Power Within: Igniting Student Motivation Introduction: In the realm of education, motivation acts as the fuel that propels students towards academic success. However, there are moments when even the most driven students find their enthusiasm waning.  During such times, it becomes crucial to reignite the fire within, to tap into the reservoir of untapped potential waiting to be unleashed. This blog post aims to provide a burst of inspiration and practical tips to help students rediscover their motivation and pursue their dreams with unwavering determination. Embrace Your Purpose: Motivation thrives when there is a clear sense of purpose.  Ask yourself, "Why am I pursuing my education?"  Understanding your goals and aspirations will give your efforts meaning and provide a foundation for sustained motivation. Take time to reflect on your passions, dreams, and the impact you wish to create in the world. Set Goals, Big and Small: Break down your long-term goals int

 Class 10 Science-1 Chapter 2 Periodic Classification of Elements Periodic Classification Of Elements Question 1. Rearrange the columns 2 and 3 so as to match with the column 1. Answer: Column 1 Column 2 Column 3 i. Triad Average of the first and the third atomic mass Dobereiner ii. Octave Properties of the eighth element similar to the first Newlands iii. Atomic number Positive charge on the nucleus Moseley iv. Period Sequential change in molecular formulae Mendeleev v. Nucleus Concentrated mass and positive charge Rutherford vi. Electron Lightest and negatively charged particle in all the atoms Thomson Question 2. Choose the correct option and rewrite the statement: (a) The number of electrons in the outermost shell of alkali metals is……. (a)