What is an element? How are electrons arranged in an atom?. What sub-atomic particle is the same in all atoms of a particular element? Where do we find all the elements? Complete the table to show the properties of the sub-atomic particles. What is the overall charge on an atom? Explain your answer. Sub-atomic particle Complete the equation Label the diagram to show the structure of an atom. the alkali metals so noble 1/1840 Complete the diagram to show the electronic structure of magnesium. Mg Neutrons Hydrogen Li2O Complete the equation Lithium + Water 30 Give the electronic configuration of the following elements. Silicon Helium Lithium Argon What happens to mass in a chemical reaction? Mass number: Electrons Li + O2 Potassium What do the following tell you? Atomic number: Balance the equation below and explain what it shows. Number of Protons Write the chemical symbols for the following elements: Oxygen Sodium Fluorine Nitrogen gases What type of boding occurs between non-metals? Element 1 . Complete the table below. Relative mass 0 Describe how a metal and nonmetal react to form an ionic bond. Why are the unreactive? Relative charge Proton Sodium + Oxygen Why are reactive? Why are nitrogen and phosphorus both in group 5? What is an element? Substanve made of only one type of atom. How are electrons arranged in an atom?. In different energy levels. What sub-atomic particle is the same in all atoms of a particular element? Protons Where do we find all the elements? In the periodic table What is the overall charge on an atom? Explain your answer. Neutral The number of electrons, which are negtive, is equal to the number of protons, which are positive Label the diagram to show the structure of an atom. electron neutron proton nucleus Why are the alkali metals so reactive? They only have one electron in their outer energy level. Complete the table to show the properties of the sub-atomic particles. Sub-atomic particle Complete the equation Sodium + Oxygen Describe how a metal and metal react to form an bond. Metal loses electrons, becomes a positive ion Non-metal gains electrons becomes of positive ion Sodium oxide nonionic and and What type of boding occurs between non-metals? Covalent Balance the equation below and explain what it shows. Number of Protons Neutrons Electrons Potassium 19 21 19 Hydrogen 1 0 1 Zinc 30 35 30 2Li + O2 Relative charge +1 1 Neutron 0 1 Electron -1 1/1840 Write the chemical symbols for the following elements: Oxygen O Sodium Na Fluorine F Nitrogen N Mg What do the following tell you? Atomic number: number of protons in an atom Mass number: number of protons and neutrons in an atom Li2O 2 atoms of lithium React with one molecule of oxygen To form 1 molecule of lithium oxide Relative mass Proton Complete the diagram to show the electronic structure of magnesium. Why are the noble gases unreactive? They have a full outer shell of electrons. Complete the table below. Element Why are nitrogen and phosphorus both in group 5? They both have five electrons in their highest energy level Give the electronic configuration of the following elements. Silicon 2, 8, 4 Helium 2 Lithium 2, 1 Argon 2, 8, 8 What happens to mass in a chemical reaction? It is conserved. Complete the equation Lithium + Water Lithium+ Hydrogen Hydroxide