Fichas
Atomic Structure
Fichas del conjunto (19)
- 1Atoms are the small particles......that make up all matter.
- 2The nucleus contains the particles:protons and neutrons.
- 3_____ moves around the outside of the atom?Electrons
- 4Protons have a......positive electric charge.
- 5Neutrons have......no electric charge.
- 6Electrons have......a negative electric charge.
- 7Protons and neutrons are......much heavier than electrons.
- 8The mass number is......the number of protons and neutrons added together.
- 9The atomic number is......the number of protons and the number of electrons.
- 10How do I find the number of protons or the number of electrons?You just find out the atomic number (smaller number).
- 11How do I work out the number of neutrons?You just subtract the atomic number from the mass number (big number minus small number).
- 12What are Isotopes?Isotopes are atoms with the same atomic number but different mass numbers -> same numbers of protons/electrons but different number of neutrons.
- 13How do I work out the overall mass number?Add the fraction of one isotope times by the mass number for that isotope to the fraction for the other isotope times by the mass number for that isotope.
- 14True or False: In the periodic table, elements in vertical groups are similar.True.
- 15What are the horizontal rows in the periodic table called?Periods.
- 16The group number tells you......the number of electrons in the outer shell eg: group 1 atoms have 1 electron in their outer shells.
- 17Are the noble gases "happy" or "sad"? Why?They are happy because they have full outer shells and are stable.
- 18Metals and non-metals can react together by giving and gaining electrons in......ionic bonding.
- 19An ion is......a positively or negatively charged particle.