One scientist over a short period of time
One scientist over a long period of time
Many scientists over a short period of time
many scientists over a long period of time
Both an electron and a proton are positive.
An electron is positive and a proton is nega- tive.
An electron is negative and a proton is posi- tive.
Both an electron and a proton are negative.
A high probability of finding an electron
A high probability of finding a neutron
A circular path in which electrons are found
A circular path in which neutrons are found
Si and Bi
As and Ar
Ge and Te
Ne and Xe
Iron can be flattened into sheets.
Iron conducts electricity and heat.
Iron combines with oxygen to form rust.
Iron can be drawn into a wire.
Transferred from one atom to another
Captured by the nucleus
Mobile within a metal
Shared between two atoms
Polar, with a symmetrical distribution of charge
Polar, with an asymmetrical distribution of charge
Nonpolar, with a symmetrical distribution of charge
Nonpolar, with an asymmetrical distribution of charge
It becomes a negative ion and its radius decreases.
It becomes a negative ion and its radius increases.
It becomes a positive ion and its radius decreases.
It becomes a positive ion and its radius increases.
High ionization energy
highly mobile protons in the nucleus
highly mobile electrons in the valence shell
10 g of water at 35°C
10 g of water at 55°C
100 g of water at 25°C
100 g of water at 45°C
High pressure and high temperature
High pressure and low temperature
Low pressure and high temperature
Low pressure and low temperature
The same chemical and physical properties
The same chemical properties and different physical properties
Different chemical properties and the same physical properties
Different chemical and physical properties
Lower kinetic energy
More surface area
More zinc atoms
The forward reaction rate is less than the reverse reaction rate.
The forward reaction rate is greater than the reverse reaction rate.
The forward reaction rate is equal to the reverse reaction rate.
The forward reaction rate stops and the reverse reaction rate continues.
Lowering the activation energy of the reaction
Lowering the potential energy of the products
Raising the temperature of the reactants
Raising the concentration of the reactants
0 to +2
0 to -2
+2 to 0
-2 to 0