Which of the following groups contains reactive elements that need to gain only one electron to have a full outer energy level?

alkali metals

alkaline earth metals

halogens

noble gases

How do valence electrons cause atoms to react or combine chemically

What substance is made when alkalis react with oils and fats?

Which of the following would increase the conductivity of a connecting wire? (More than one answer). A) increase the diameter B) increase the length of the wire C) decrease the temperature o the wire D) switch from steel wire to gold wire

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A balloon contains 5 L of oxygen at a pressure of 90 kPa. How much oxygen will the balloon contain if the pressure is lowered to 67 kPa?

3. A compound was analyzed and found to contain 9.8 g of nitrogen, 0.70 g of hydrogen, and 33.6 g of oxygen. What is the empirical formula of the compound?

A 126-gram sample of titanium metal is heated from 20.0°C to 45.4°C while absorbing 1.68 kJ of heat. What is the specific heat of titanium?

What pressure (in atm) will a sample of o2 gas occupy at 100.0 ml, if o2 has a volume of 25.00 ml at 2.0 atm?

What happens when francium and nitrogen are mixed

Which type of chemical reaction occurs in 2KClO3 Right arrow. 2KCl + 3O2