Static Electricity - Mission SE1 Detailed Help

The charges on several spheres are shown. Which spheres are positively charged (OR negatively charged OR neutral)? (Note that there are 8 individual charge signs on each sphere.)

Each of the diagrams depict an object with plus (+) and minus (-) signs. The plus and minus signs represent the positive and negative charges present in the object. There are a total of eight different positive and negative signs on each object.

Charged vs. Uncharged Objects
Objects are made of atoms and the charged parts of atoms are protons and electrons. Protons are charged positively and electrons are charged negatively. Whether or not an object is charged or uncharged (neutral) is dependent upon whether the numbers of protons (+ type of charge) or electrons (- type of charge) are balanced or imbalanced. A neutral object possesses the same amount of the two types of charge while a charged object has a imbalance of the two types of charge. If an object is charged, then it can be either positively- or negatively charged. A positively charged object possesses more protons than electrons and a negatively charged object possesses more electrons than protons.