What is an atom True or false?
Atoms are defined as the basic building blocks of matter. An atom is composed of three particles, namely, neutrons, protons and electrons with hydrogen as an exception without neutrons. Every atom has a nucleus that bounds one or more electrons around it.
Which of the following statement is not true about atoms?
It is not true that atoms cannot exist independently. Atoms of most elements cannot exist independently, although inert gases can exist as atoms.
Which of the following statement is correct about the atom of an element?
Solution. An atom must have a proton and an electron, but it may not have a neutron. For example, in hydrogen atom, there is 1 proton, 1 electron but no neutron.
What is true about atom and its structure?
An atom is a complex arrangement of negatively charged electrons arranged in defined shells about a positively charged nucleus. This nucleus contains most of the atom's mass and is composed of protons and neutrons (except for common hydrogen which has only one proton).
What are atoms made of?
Atoms are constructed of two types of elementary particles: electrons and quarks. Electrons occupy a space that surrounds an atom's nucleus. Each electron has an electrical charge of -1. Quarks make up protons and neutrons, which, in turn, make up an atom's nucleus.
Which statement best describes the structure of an atom?
Expert-verified answer The statement which best describes an atom is B. a group of protons and neutrons that are surrounded by electrons.
Which of the following is incorrect about atoms?
Answer. Option A is false. Atoms are not able to exist independently. All the elements on the far right side of the periodic table (inert or noble gas) atoms can exist independently because they all fulfil the octet rule.
Which of the following statement is incorrect about the structure of atom?
The incorrect statement about the structure of an atom is the whole mass of an atom is concentrated in the nucleus. In an atom, only 99.9% of the mass is concentrated in the nucleus. This is because the nucleus is composed of neutrons and protons that are much heavy than electrons.
Which of the following is a correct description of an atom?
An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.
Which of the following is true about an individual atom?
An individual atom does not possess a state of matter. Rather, it is the arrangement of atoms that prescribes a particular state of matter. A solid, for instance, would be comprised of a bunch of atoms tightly packed together.
Which is a characteristic of atoms?
The single most important characteristic of an atom is its atomic number (usually denoted by the letter Z), which is defined as the number of units of positive charge (protons) in the nucleus. For example, if an atom has a Z of 6, it is carbon, while a Z of 92 corresponds to uranium.
What do you know about atom?
An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.
What are 3 facts about atoms?
Useful and Interesting Atom Facts and Trivia
- There are three parts to an atom. …
- Atoms are the smallest particles that make up elements. …
- Atoms are mostly empty space. …
- There are over 100 different kinds of atoms. …
- The components of an atom are held together by three forces.
What is an atom answer?
An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.
Which statement about the atoms nucleus is correct?
Which statement about the atomic nucleus is correct? The nucleus is made of protons and neutrons and has a positive charge.
Which is of the following best describes an atom?
Expert-verified answer The statement which best describes an atom is B. a group of protons and neutrons that are surrounded by electrons. What is an atom? An atom can be described as the smallest part of matter.
Which of the following statements about the mass of an atom is true?
The correct option is (b) The atomic number is the same as the number of protons. The atomic mass is the sum of a number of protons and neutrons. See full answer below.
What is an atom quizlet?
Atom. An atom is the smallest particle of an element that still has elemental properties. Atoms are made up of similar properties called protons, neutrons, and electrons.
Which of the following is true about a charged atom?
Answer: The number of protons and the number of electrons within the same atom are unequal. The number of protons and the number of electrons within the same atom are unequal is true in regard to a charged atom.
What are the 3 characteristics of atoms?
Atoms consist of three basic particles: protons electrons and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
What are the 4 properties of atom?
The nuclear properties (atomic mass, nuclear cross-sections) of the element are determined by the number of protons (atomic number) and the number of neutrons (neutron number)….Therefore, there are various non-equivalent definitions of atomic radius.
- Van der Waals radius. …
- Ionic radius. …
- Covalent radius. …
- Metallic radius.
What is atom made up of?
Every atom is composed of a nucleus and one or more electrons bound to the nucleus. The nucleus is made of one or more protons and a number of neutrons. Only the most common variety of hydrogen has no neutrons. More than 99.94% of an atom's mass is in the nucleus.
What does an atom consists of?
The atom consists of a tiny nucleus surrounded by moving electrons. The nucleus contains protons, which have a positive charge equal in magnitude to the electron's negative charge. The nucleus may also contain neutrons, which have virtually the same mass but no charge.
What are characteristics of atoms?
It is composed of protons, which have a positive charge, and neutrons, which have no charge. Protons, neutrons, and the electrons surrounding them are long-lived particles present in all ordinary, naturally occurring atoms.
What do you know about atoms?
An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.
Which of the following describes atoms?
An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.
Which statement best describes the structure of atom?
Expert-verified answer The statement which best describes an atom is B. a group of protons and neutrons that are surrounded by electrons.
Which statement best describes the structure of atoms?
The statement which best describes an atom is B. a group of protons and neutrons that are surrounded by electrons. What is an atom? An atom can be described as the smallest part of matter.
Which of the following statement is true about the atomic number of atoms?
The correct option is (b) The atomic number is the same as the number of protons. The atomic mass is the sum of a number of protons and neutrons. See full answer below.
Which is the best description of an atom?
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 of chemistry.