* @see org.concord.mw2d.models.Element
	 */
	public double getKEOfType(byte element) {
		if (typeList == null) {
			typeList = new ArrayList<Atom>();
		} else {
			typeList.clear();
		}
		for (int i = 0; i < numberOfAtoms; i++) {
			if (atom[i].id == element)
				typeList.add(atom[i]);
		}
		return getKEOfParticles(typeList);
	}