PT & Atoms

Elements in the same period have what in common? 

• same number of valence electrons
• react the same
• have the same protons 
• same number of energy levels

Elements in the same group or family have all of this in common EXCEPT?

• same number of valence electrons
• React similarly
• have similar chemical properties
• have the same number of energy levels 

Which two elements have similar chemical properties? 

• Carbon and nitrogen
• Carbon and phosphorus 
• Carbon and Silicon 
• Carbon and aluminum 

How many Valance electrons does Iodine Have?

• 6
• 16
• 7
• 17

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals (group 1) 
• alkaline earth metals (group 2)
• halogens (group 17) 
• noble gases (group 18) 

How many protons, neutrons, and electrons are found in 1 atom of Boron?

• 5 protons, 11 neutrons, 5 electrons

• 6 protons, 11 neutrons, 5 electrons

• 5 protons, 6 neutrons, 5 electrons

• 5 protons, 5 neutrons, 5 electrons

What particle uniquely identifies an element?

• Number of Valence Electrons
• Number of Protons
• Number of Electrons
• Atomic Mass

Which subatomic particles contribute the most mass to the atom?

• Protons, Neutrons, Electrons

• Protons only

• Protons and Electrons

• Protons and Neutrons

What would be the charge of an atom that had 10 protons and 9 electrons

• Neutral, no charge

• +1

• -1

• +10

Which subatomic particle determines the reactivity of an atom?

• Protons

• Neutrons

• Electrons

• Valence electrons