根据文章倒数第二段最后一句 "The 226 neutrons in radium-226 make this atom glow in the dark.” 可知, 226个中子使得镭-226 在黑暗中闪烁, 所以A正确。 4]A细节理解题。 根据文章最后一段第二句话 "Once that happens, though, the pieces are no longer a part of one chemical element.”可知, 一...
An atom is a building block of matter that cannot be divided into small pieces by any chemical process. Most atoms contain three particles: protons, neutrons, and electrons. The defining particle that identifies an atom is the number of protons it contains. So, a particle that lacks protons ...
An atom of an element has 10 protons. what is also true of that atom? What is an atom that has a different number of neutrons than other atoms of the same element? All atoms of an element have the same what? How do atoms of neon-20 and neon-22 differ?
Anything that has mass and takes up space matter Data that is represented by numbers quantitative A substance that cannot be broken down into simpler substances element When two or more elements are chemically combined compound Atoms of the same element that have different numbers of neutrons ...
A subatomic particle that has a positive charge and that is found in the nucleus of an atom Neutron A subatomic particle that has no charge and that is found in the nucleus of an atom Isotope Atoms of the same element that have different numbers of neutrons ...
isotope - one of two or more atoms with the same atomic number but with different numbers of neutrons monad - (chemistry) an atom having a valence of one chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simp...
1 This question is about elements X, Y and Z.(a) An atom o f element X is represented as ½{3X.(i) Name the different types o f particles found in the nucleus o f this atom o f X.neutrons(i) What is the term for the total number o f particles in the nucleus o f a...
Atom, smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block
nucleus of an atom consists of neutrons and protons, theneutronbeing an uncharged particle and theprotona positively charged one. Their masses are almost equal. Atoms containing the same number of protons but different numbers of neutrons represent different forms, orisotopes, of the same element....
Atoms are the purest form of matter. They consist of protons, neutrons, and electrons. The periodic table lists all of the different types of atoms that are known to exist and are known as elements.Answer and Explanation: An atom that has more protons than electrons is called a cation. ...