Across
- 5. the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus.
- 6. atoms with the same number of protons but different numbers of neutrons and columns according to increasing atomic number.
- 9. force that holds atoms together in a metallic substance.
- 11. form between two or more atoms by the transfer of one or more electrons between atoms.
- 12. a negatively charged subatomic particle that can be either bound to an atom or free.
- 13. a chemical element that forms a salt when it reacts with metal.
- 15. a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral.
- 17. a lasting attraction between atoms or ions that enables the formation of molecules and crystals.
- 19. quantity that designates how fast and in what direction a point is moving.
- 20. of an object is the force acting on the object due to gravity.
- 22. a particle that consists of a nucleus of protons and neutrons surrounded by a cloud of electron.s
- 23. a measatom or group of atoms carrying a negative electric charge.urement of mass in motion.
- 26. the quantity of matter contained in an atom of an element.
- 27. formed by equal sharing of electrons from both the participating atoms.
- 28. stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg
- 29. atom or group of atoms that bears a positive electric charge.
Down
- 1. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
- 2. organizes all discovered chemical elements in rows
- 3. the push or pull on an object with mass causes it to change its velocity.
- 4. any process where the velocity changes.
- 7. half the distance between the nuclei of identical neighbouring atoms in the solid form of an element.
- 8. a measure of an atom's ability to attract shared electrons to itself.
- 10. a covalent bond in which the atoms have an unequal attraction for electrons, and so the sharing is unequal.
- 14. neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen.
- 16. a substance that can't be broken down by non-nuclear reactions
- 18. the distance between the nucleus of an ion and the outermost shell of the ion.
- 21. the electrons in the outermost shell, or energy level, of an atom
- 24. a dimensionless quantity representing the amount of matter in a particle or object.
- 25. the smallest particle of a substance that has all of the physical and chemical properties of that substance.
- 30. atom or group of atoms carrying a negative electric charge.