In the Periodic Table, how does the metallic character of the elements vary from left to right across a period? A It decreases. B It increases. C It increases then
stoichiometry is the relationship between the quantities of reactants and products before, during, and following chemical reactions.
“Accept yourself, love yourself, and keep moving forward. If you want to fly, you have to give up what weighs you down.” ― Roy T. Bennett, The Light in the
Which sex chromosomes are present in all mature human sperm cells? A both X and Y chromosomes B either X or Y chromosomes C only X chromosomes D only Y
noble gas, any of the seven chemical elements that make up Group 8 (VIII) of the periodic table.
Enzymes are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different
In organic chemistry, an alkene is a hydrocarbon containing a carbon–carbon double bond. The double bond may be internal or in the terminal position.
Transportation in Animals. Transportation in animals is the movement of food, water, and oxygen to different parts of the body.
Deforestation and climate change are two possible causes of the population decrease of the Resplendent Quetzal birds. Suggest two other possible causes of the population decrease of the Resplendent Quetzal
A student takes 2 g samples of calcium carbonate and adds them to 20 cm3 samples of dilute hydrochloric acid at different temperatures. She measures how long it takes for
A reactivity series (or activity series) is an empirical, calculated, and structurally analytical progression of a series of metals, arranged by their "reactivity" from highest to lowest.
A clothing shop uses a barcode reader at the checkout. The checkout is linked to a stock control system. The system monitors stock levels and automatically keeps them above a
A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs.
In chemistry and manufacturing, electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the
Students often make several common mistakes in mathematics, which can hinder their understanding and performance. Here are some of
Algebra is a fundamental branch of mathematics that deals with symbols, variables, and their relationships, often used to represent quantities without specific values. Its primary focus is on solving equations
What is a wireless network? Answer: A wireless network is a network that allows devices to connect and communicate wirelessly...
Force in physics is the push or pull on an object that causes it to change its velocity or direction123. Force is a vector quantity, meaning it has a magnitude
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Computer science is the study of computers and computational systems, including their design, development, and applications.