Periodic Trends

Who proposed this model, which included negatively charged particles in a positively charged background?

• JJ Thomson
• Rutherford
• Dalton
• Bohr

Which statement best describes Rutherford's contribution to the development of the model of the atom?

• Positively charged center called the nucleus.
• Negatively charged electrons.
• Electrons can only occupy specific levels outside the nucleus.
• None of these

How many protons does an atom of mercury have?

• 200.6
• 120
• 80
• 0

Which quantity is determined by adding protons to neutrons?

• number of electrons
• atomic number
• atomic mass
• mass number

What makes Hydrogen-1 different from Hydrogen-2

• the number of protons
• the number of electrons
• the number of neutrons
• their atomic numbers

Which properties are characteristic of the group 1 metals?

• high reactivity and the formation of stable compounds
• high reactivity and the formation of unstable compounds
• low reactivity and the formation of stable compounds
• low reactivity and the formation of unstable compounds

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

As atoms of elements in group 16 are considered in order from top to bottom, the electronegativity of each successive element....

• decreases
• increases
• remains the same
• none of the above

Which of these elements in period three has the least tendency to attract electrons?

• Mg
• Al
• S
• Cl

As elements from group 1 are considered in order from top to bottom, the ionization energy of each successive element will...

• decrease
• increase 
• remain the same
• none of the above

Within period 2 of the periodic table, as the atomic number increases, the atomic radius generally

• decreases
• increases
• remains the same
• none of the above

Tags

NGSS.HS-PS1-1