Atomic Structure / Periodic Table N3/4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Calderglen High School

Elements are arranged in terms of their chemical properties How are elements arranged in the Periodic Table? 1. answer Elements are arranged in terms of their chemical properties Calderglen High School

Calderglen High School What is similar about elements in the same group (column) of the periodic table? 2. answer Elements in the same group show similar chemical properties Calderglen High School

What are the NOBLE GASES? 3. answer The very unreactive Group 0 elements. Calderglen High School

What is the name given to the centre of an atom? 4. What is the name given to the centre of an atom? answer The NUCLEUS Calderglen High School

Describe the structure of an atom? 5. answer An atom is a very small particle with a positively charged centre (nucleus) surrounded by moving negatively charged electrons Calderglen High School

Calderglen High School What is a nucleus? 6. answer The very small positively charged centre of atom. It contains protons and neutrons. Calderglen High School

What charge has the centre of an atom? 7. answer Positive charge Calderglen High School

Where are the electrons found in an atom? 8. answer Outside the nucleus (in energy levels) Calderglen High School

Calderglen High School 9. What is ATOMIC NUMBER? answer The number of protons in an atom. It is the number by which elements are arranged in the Periodic Table Calderglen High School

Why are atoms electrically neutral? 10. answer The number of positively charged protons equals the number of negatively charged electrons Calderglen High School

What information does the group number give? 11. answer The group number = the number of electrons in the outer energy level Calderglen High School

What is the mass and charge of a proton? 12. answer Mass Charge Proton 1 amu + Calderglen High School

What is the mass and charge of a electron? 13. answer Mass Charge Electron almost 0 - Calderglen High School

What is the mass and charge of a neutron? 14. answer Mass Charge Neutron 1 amu 0 Calderglen High School

Calderglen High School What is the same about the electron arrangement of atoms in the same group? 15. answer They have the same number of electrons in their outer energy levels. Calderglen High School

Calderglen High School What is the connection between the electron arrangement and the chemical properties of an element? 16. answer Elements with the same number of outer electrons have similar chemical properties Calderglen High School

What is the MASS NUMBER of an atom? 17. answer No of Protons + No of Neutrons Calderglen High School

Calderglen High School What is an ION? 18. answer A charged particle formed when electrons are gained or lost by an atom Calderglen High School

How is a positive ion formed? 19. answer An atom loses an outer electron(s) Calderglen High School

How is a negative ion formed? 20. answer An atom gains an outer electron(s) Calderglen High School

A group of non-metal atoms joined together by covalent bonds. What is a MOLECULE? 21. answer A group of non-metal atoms joined together by covalent bonds. Calderglen High School

Calderglen High School What is a diatomic? 22. answer A molecule containing two atoms. e.g. H2, HCl. Calderglen High School

Which elements exist as diatomic molecules? 23. answer Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, Iodine. Calderglen High School