What is true about 1.0 mol Ca and 1.0 mol Mg? -They are equal in mass. -They contain the same number of atoms. -They have the same atomic mass. -Their molar masses are equal.
Answers
As the molar mass and atomic mass of mg and ca are 24 and 40 respectively. Both cases and mg have 1 mol so the no. of atoms shall be the same.
Answer:
They contain the same number of atoms.
Explanation:
Here given,1.0 mol Ca and 1.0 mol Mg.
They have same number of atoms because these both have same avogadro number 6.022×10²³.
Atom related more information:
An atom is a particle consisting of a nucleus of protons and neutrons surrounded by a cloud of electrons. An atom is the basic unit of chemical elements, and chemical elements are distinguished from each other by the number of protons in their atomic nuclei. For example, any atom containing 11 protons is sodium, and any atom containing 29 protons is copper. The number of neutrons determines the isotope of an element. Every plasma , liquid, solid,gas is made up of neutral or ionized atoms. Atoms are extremely small, usually about 100 picometers in diameter. They are so small that it is impossible to accurately predict their behavior using classical physics, as if they were tennis balls, for example due to quantum effects.
Over 99.94% of the mass of an atom is located in the nucleus. Protons have a positive electrical charge, neutrons have no electrical charge. electrons have a -ve electrical charge.If the number of protons and electrons is equal, then the atom is electrically neutral. If an atom has more or fewer electrons than protons, it has a negative or positive charge, respectively - such atoms are called ions.
The electrons in an atom are attracted to the protons in the nucleus of the atom by the electromagnetic force. Protons and neutrons in the nucleus are attracted to each other by the nuclear force. This force is usually stronger than the electromagnetic force that repels positively charged protons away from each other. Under certain circumstances, the repulsive electromagnetic force becomes stronger than the nuclear force. In this case, the nucleus splits and leaves behind different elements. This is a form of nuclear fission.
Atoms can attach to one or more other atoms through chemical bonds to form chemical compounds such as molecules or crystals. For example, the Statue of Liberty in New York was originally made of pure copper, but over the years the surface combined with oxygen, carbon and sulfur atoms, giving the copper a green patina. The ability of atoms to attach and detach is responsible for most physical changes observed in nature. Chemistry is the discipline that studies these changes.
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