Step by step video & image solution for What is Mass Number? by Chemistry experts to help you in doubts & scoring excellent marks in Class 7 exams.Updated on:21/07/2023 Class 7CHEMISTRYATOM, MOLECULE AND CHEMICA
What is the mass number for silicon? Mass Number: Mass number refers to an exact count of the protons and neutrons in the nucleus of an atom. Each isotope of an element will have a different mass number. The protons will always remain the same across the range of isotopes, but the numb...
An atom consists of a nucleus and an electron cloud around it. Nucleus consists of protons and neutrons. A neutral atom has equal number of protons and electrons. The number of protons plus the number of neutrons is the mass number of the atom....
The total number of unit positive charges present in the nucleus of an atom is known as its Atomic Number which is equal to the number of protons in the nucleus of an atom. Atomic Number for any two different atoms is never same and hence can be used to distinguish two different atoms...
Any natural number like 1, 2, 3, etc, is termed as a cardinal number. For counting we use cardinal numbers. Similarly there is another pattern for numbers which is an ordinal number. It is a number that denotes the position of an object. For example: 1st, 2nd, 3rd etc. Mostly for ...
Lithium is a chemical element that is abbreviated 'Li.' Its name comes from the word 'lithos,' which is a Greek word that means 'stone.' Answer and Explanation: The mass number of lithium is 7. The mass number of any element is equal to its number of protons and neutrons. You can ...
Europium is a chemical element with the symbol Eu and atomic number 63. Europium is the most reactive lanthanide by far, having to be stored under an inert
百度试题 结果1 题目1. What is a possible mass number of a magnesium isotope? A 12 B 23.99 C 24 D 24.3Your answer C [1] 相关知识点: 试题来源: 解析 C 反馈 收藏
Here is a cat. Here are a few cats. Here are eight cats. Uncountable nouns Uncountable nouns, or mass nouns, are nouns that are impossible to count, whether because they name intangible concepts (information, animal husbandry, wealth), collections of things that are considered as wholes (jewe...
The Siberian Traps was a vast area of volcanic activity in Eurasia that led to the biggest mass extinction 252 million years ago. The distant mountains are remains of basalt lava flows, and the Maymecha river can be seen amid the thick volcanic layers. The foreground is also the rubbly top...