Periodic table
Periodic table
#### Which of the following elements is a noble gas?
1. [ ] Argon (Ar)
2. [ ] Calcium (Ca)
3. [ ] Chromium (Cr)
4. [x] Krypton (Kr)
#### Which of the following elements is a halogen?
1. [x] Bromine (Br)
2. [ ] Carbon (C)
3. [ ] Helium (He)
4. [ ] Iodine (I)
#### Which of the following elements is a transition metal?
1. [ ] Hydrogen (H)
2. [ ] Lithium (Li)
3. [x] Iron (Fe)
4. [ ] Neon (Ne)
#### Which of the following elements has the largest atomic radius?
1. [ ] Cesium (Cs)
2. [x] Francium (Fr)
3. [ ] Radon (Rn)
4. [ ] Radium (Ra)
#### Which of the following elements is a noble gas and has the lowest ionization energy?
1. [ ] Argon (Ar)
2. [ ] Helium (He)
3. [ ] Krypton (Kr)
4. [x] Radon (Rn)
#### Which of the following elements is a transition metal and has the highest density at room temperature?
1. [ ] Platinum (Pt)
2. [ ] Mercury (Hg)
3. [ ] Iridium (Ir)
4. [x] Osmium (Os)
