Exploring Trends in Periodic Table Organization

What are the three main trends discussed in the periodic table organization?

• Ionization energy, density, and atomic mass

• Electronegativity, reactivity, and atomic mass

• Atomic mass, density, and reactivity

• Atomic size, electronegativity, and ionization energy

What is another term for atomic size?

• Atomic density

• Atomic number

• Atomic mass

• Atomic radius

Why is atomic size difficult to measure?

• Because it depends on the number of neutrons

• Because it changes with temperature

• Because it varies with pressure

• Because it has no definite boundary

How does atomic size change across the periodic table?

• Increases from right to left and top to bottom

• Increases from left to right and top to bottom

• Decreases from left to right and top to bottom

• Decreases from right to left and bottom to top

Which element has the smallest atomic size?

• Helium

• Cesium

• Lithium

• Oxygen

Which element has the largest atomic size?

• Cesium

• Lithium

• Oxygen

• Helium

Why are atoms with more electrons smaller than those with fewer electrons?

• Because more electrons mean more repulsion

• Because more electrons mean more attraction towards protons

• Because more electrons mean higher atomic mass

• Because more electrons mean larger atomic radius

How many electrons does oxygen have?

• Four

• Seven

• Three

• Eight

What happens when electrons are too close to each other?

• They become neutral

• They combine to form a new element

• They repel each other

• They attract each other

Why does chlorine become a smaller atom than sodium?

• Because chlorine has fewer electrons

• Because chlorine has more protons

• Because chlorine has more electrons pulling towards the nucleus

• Because chlorine has a larger atomic radius