Chemical World Crossword Puzzle

QUESTIONS LIST:

• seven : group _ are the halogens
• two : the first electron shell can hold up to _ electrons
• eight : every electron shell that is not the first electron shell can hold up to _ electrons
• reactant : what is being reacted together in a chemical reaction to produce products
• gas : fizzing/effervescence is evidence a chemical reaction has happened because it signs that a _ is given off
• staircase : dividing the periodic table into metals and non-metals
• oxygen : element needed in compounds made up of 3 elements ending in -ate or -ite
• alkali : group 1 is the _ metals
• neon : a group 0/8 element used for display
• transition : the middle section of the periodic table are called _ metals
• proton : positively charged particle, atomic number is based on the number of these
• exothermic : heat energy released (temperature rise) from a chemical reaction is called an _ reaction . ​
• mercury : a metal that is liquid at room temperature
• period : a row in the periodic table is referred to a _
• ide : compounds made up of 2 elements end in _
• group : a column in the periodic table is referred to a _
• noble : group 0/8 are called the _ gases
• element : simple substances that cannot be broken down further, made up of only one type of atom
• electron : negatively charged particles that sit within shells around the nucleus
• precipitation : when a solid is produced in a chemical reaction, it is known as a _ reaction
• product : a _ is the result of having combined reactants
• neutral : atoms are _ as the number of positive protons and number of negative electrons are equal